Home / 20,701.90-28,569-11,270.62

Finding the Fourth Proportional to 20,701.90, 28,569 and 11,270.62

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Solution

The fourth proportional to 20,701.90, 28,569 and 11,270.62 is: 15,553.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.90 : 28,569 = 11,270.62 : x
  2. Step 2: Convert to fraction form
    20,701.90/28,569 = 11,270.62/x
  3. Step 3: Cross multiply
    20,701.90x = 28,569 × 11,270.62
  4. Step 4: Simplify right side
    20,701.90x = 321,990,342.78
  5. Step 5: Solve for x
    x = 321,990,342.78/20,701.90
  6. Step 6: Final answer
    x = 15,553.66

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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.