Home / 13,720.32-18,934.16-7,432.70

Finding the Fourth Proportional to 13,720.32, 18,934.16 and 7,432.70

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Solution

The fourth proportional to 13,720.32, 18,934.16 and 7,432.70 is: 10,257.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.32 : 18,934.16 = 7,432.70 : x
  2. Step 2: Convert to fraction form
    13,720.32/18,934.16 = 7,432.70/x
  3. Step 3: Cross multiply
    13,720.32x = 18,934.16 × 7,432.70
  4. Step 4: Simplify right side
    13,720.32x = 140,731,799.20
  5. Step 5: Solve for x
    x = 140,731,799.20/13,720.32
  6. Step 6: Final answer
    x = 10,257.18

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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.