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Finding the Fourth Proportional to 7,984.80, 11,152.80 and 7,984.80

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Solution

The fourth proportional to 7,984.80, 11,152.80 and 7,984.80 is: 11,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,984.80 : 11,152.80 = 7,984.80 : x
  2. Step 2: Convert to fraction form
    7,984.80/11,152.80 = 7,984.80/x
  3. Step 3: Cross multiply
    7,984.80x = 11,152.80 × 7,984.80
  4. Step 4: Simplify right side
    7,984.80x = 89,052,877.44
  5. Step 5: Solve for x
    x = 89,052,877.44/7,984.80
  6. Step 6: Final answer
    x = 11,152.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.