Home / 13,720.30-18,934-7,432.68

Finding the Fourth Proportional to 13,720.30, 18,934 and 7,432.68

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Solution

The fourth proportional to 13,720.30, 18,934 and 7,432.68 is: 10,257.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.30 : 18,934 = 7,432.68 : x
  2. Step 2: Convert to fraction form
    13,720.30/18,934 = 7,432.68/x
  3. Step 3: Cross multiply
    13,720.30x = 18,934 × 7,432.68
  4. Step 4: Simplify right side
    13,720.30x = 140,730,363.12
  5. Step 5: Solve for x
    x = 140,730,363.12/13,720.30
  6. Step 6: Final answer
    x = 10,257.09

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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.