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Finding the Fourth Proportional to 9,886.13, 14,864.75 and 9,115.55

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Solution

The fourth proportional to 9,886.13, 14,864.75 and 9,115.55 is: 13,706.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,886.13 : 14,864.75 = 9,115.55 : x
  2. Step 2: Convert to fraction form
    9,886.13/14,864.75 = 9,115.55/x
  3. Step 3: Cross multiply
    9,886.13x = 14,864.75 × 9,115.55
  4. Step 4: Simplify right side
    9,886.13x = 135,500,320.33
  5. Step 5: Solve for x
    x = 135,500,320.33/9,886.13
  6. Step 6: Final answer
    x = 13,706.11

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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.