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Finding the Fourth Proportional to 8,806,821.20, 13,210,231.80 and 7,463,128.40

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Solution

The fourth proportional to 8,806,821.20, 13,210,231.80 and 7,463,128.40 is: 11,194,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,806,821.20 : 13,210,231.80 = 7,463,128.40 : x
  2. Step 2: Convert to fraction form
    8,806,821.20/13,210,231.80 = 7,463,128.40/x
  3. Step 3: Cross multiply
    8,806,821.20x = 13,210,231.80 × 7,463,128.40
  4. Step 4: Simplify right side
    8,806,821.20x = 98,589,656,117,163.12
  5. Step 5: Solve for x
    x = 98,589,656,117,163.12/8,806,821.20
  6. Step 6: Final answer
    x = 11,194,692.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.