Home / 13,397.20-18,487.44-7,428.81

Finding the Fourth Proportional to 13,397.20, 18,487.44 and 7,428.81

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Solution

The fourth proportional to 13,397.20, 18,487.44 and 7,428.81 is: 10,251.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.20 : 18,487.44 = 7,428.81 : x
  2. Step 2: Convert to fraction form
    13,397.20/18,487.44 = 7,428.81/x
  3. Step 3: Cross multiply
    13,397.20x = 18,487.44 × 7,428.81
  4. Step 4: Simplify right side
    13,397.20x = 137,339,679.15
  5. Step 5: Solve for x
    x = 137,339,679.15/13,397.20
  6. Step 6: Final answer
    x = 10,251.37

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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.