Home / 20,901.28-28,830.11-12,397.04

Finding the Fourth Proportional to 20,901.28, 28,830.11 and 12,397.04

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Solution

The fourth proportional to 20,901.28, 28,830.11 and 12,397.04 is: 17,099.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.28 : 28,830.11 = 12,397.04 : x
  2. Step 2: Convert to fraction form
    20,901.28/28,830.11 = 12,397.04/x
  3. Step 3: Cross multiply
    20,901.28x = 28,830.11 × 12,397.04
  4. Step 4: Simplify right side
    20,901.28x = 357,408,026.87
  5. Step 5: Solve for x
    x = 357,408,026.87/20,901.28
  6. Step 6: Final answer
    x = 17,099.82

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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.