Home / 13,397.16-18,487.77-7,428.78

Finding the Fourth Proportional to 13,397.16, 18,487.77 and 7,428.78

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Solution

The fourth proportional to 13,397.16, 18,487.77 and 7,428.78 is: 10,251.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.16 : 18,487.77 = 7,428.78 : x
  2. Step 2: Convert to fraction form
    13,397.16/18,487.77 = 7,428.78/x
  3. Step 3: Cross multiply
    13,397.16x = 18,487.77 × 7,428.78
  4. Step 4: Simplify right side
    13,397.16x = 137,341,576.02
  5. Step 5: Solve for x
    x = 137,341,576.02/13,397.16
  6. Step 6: Final answer
    x = 10,251.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.