Home / 13,397.90-18,488.37-7,429.15

Finding the Fourth Proportional to 13,397.90, 18,488.37 and 7,429.15

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Solution

The fourth proportional to 13,397.90, 18,488.37 and 7,429.15 is: 10,251.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.90 : 18,488.37 = 7,429.15 : x
  2. Step 2: Convert to fraction form
    13,397.90/18,488.37 = 7,429.15/x
  3. Step 3: Cross multiply
    13,397.90x = 18,488.37 × 7,429.15
  4. Step 4: Simplify right side
    13,397.90x = 137,352,781.54
  5. Step 5: Solve for x
    x = 137,352,781.54/13,397.90
  6. Step 6: Final answer
    x = 10,251.81

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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.