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Finding the Fourth Proportional to 8,999.10, 13,484.07 and 7,140.15

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Solution

The fourth proportional to 8,999.10, 13,484.07 and 7,140.15 is: 10,698.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.10 : 13,484.07 = 7,140.15 : x
  2. Step 2: Convert to fraction form
    8,999.10/13,484.07 = 7,140.15/x
  3. Step 3: Cross multiply
    8,999.10x = 13,484.07 × 7,140.15
  4. Step 4: Simplify right side
    8,999.10x = 96,278,282.41
  5. Step 5: Solve for x
    x = 96,278,282.41/8,999.10
  6. Step 6: Final answer
    x = 10,698.66

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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.