Home / 20,704.17-28,557.25-12,750.78

Finding the Fourth Proportional to 20,704.17, 28,557.25 and 12,750.78

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Solution

The fourth proportional to 20,704.17, 28,557.25 and 12,750.78 is: 17,587.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.17 : 28,557.25 = 12,750.78 : x
  2. Step 2: Convert to fraction form
    20,704.17/28,557.25 = 12,750.78/x
  3. Step 3: Cross multiply
    20,704.17x = 28,557.25 × 12,750.78
  4. Step 4: Simplify right side
    20,704.17x = 364,127,212.16
  5. Step 5: Solve for x
    x = 364,127,212.16/20,704.17
  6. Step 6: Final answer
    x = 17,587.14

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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.