Home / 20,700.61-28,569.42-11,751.01

Finding the Fourth Proportional to 20,700.61, 28,569.42 and 11,751.01

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Solution

The fourth proportional to 20,700.61, 28,569.42 and 11,751.01 is: 16,217.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.61 : 28,569.42 = 11,751.01 : x
  2. Step 2: Convert to fraction form
    20,700.61/28,569.42 = 11,751.01/x
  3. Step 3: Cross multiply
    20,700.61x = 28,569.42 × 11,751.01
  4. Step 4: Simplify right side
    20,700.61x = 335,719,468.69
  5. Step 5: Solve for x
    x = 335,719,468.69/20,700.61
  6. Step 6: Final answer
    x = 16,217.86

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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.