Home / 20,385.56-28,150.04-12,845.36

Finding the Fourth Proportional to 20,385.56, 28,150.04 and 12,845.36

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Solution

The fourth proportional to 20,385.56, 28,150.04 and 12,845.36 is: 17,737.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.56 : 28,150.04 = 12,845.36 : x
  2. Step 2: Convert to fraction form
    20,385.56/28,150.04 = 12,845.36/x
  3. Step 3: Cross multiply
    20,385.56x = 28,150.04 × 12,845.36
  4. Step 4: Simplify right side
    20,385.56x = 361,597,397.81
  5. Step 5: Solve for x
    x = 361,597,397.81/20,385.56
  6. Step 6: Final answer
    x = 17,737.92

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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.