Home / 13,390.59-18,480.12-7,424.13

Finding the Fourth Proportional to 13,390.59, 18,480.12 and 7,424.13

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Solution

The fourth proportional to 13,390.59, 18,480.12 and 7,424.13 is: 10,245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.59 : 18,480.12 = 7,424.13 : x
  2. Step 2: Convert to fraction form
    13,390.59/18,480.12 = 7,424.13/x
  3. Step 3: Cross multiply
    13,390.59x = 18,480.12 × 7,424.13
  4. Step 4: Simplify right side
    13,390.59x = 137,198,813.30
  5. Step 5: Solve for x
    x = 137,198,813.30/13,390.59
  6. Step 6: Final answer
    x = 10,245.91

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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.