Home / 20,817.60-28,737.12-12,434.88

Finding the Fourth Proportional to 20,817.60, 28,737.12 and 12,434.88

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Solution

The fourth proportional to 20,817.60, 28,737.12 and 12,434.88 is: 17,165.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.60 : 28,737.12 = 12,434.88 : x
  2. Step 2: Convert to fraction form
    20,817.60/28,737.12 = 12,434.88/x
  3. Step 3: Cross multiply
    20,817.60x = 28,737.12 × 12,434.88
  4. Step 4: Simplify right side
    20,817.60x = 357,342,638.75
  5. Step 5: Solve for x
    x = 357,342,638.75/20,817.60
  6. Step 6: Final answer
    x = 17,165.41

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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.