Home / 20,351.18-28,084.77-11,398.69

Finding the Fourth Proportional to 20,351.18, 28,084.77 and 11,398.69

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Solution

The fourth proportional to 20,351.18, 28,084.77 and 11,398.69 is: 15,730.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,351.18 : 28,084.77 = 11,398.69 : x
  2. Step 2: Convert to fraction form
    20,351.18/28,084.77 = 11,398.69/x
  3. Step 3: Cross multiply
    20,351.18x = 28,084.77 × 11,398.69
  4. Step 4: Simplify right side
    20,351.18x = 320,129,586.95
  5. Step 5: Solve for x
    x = 320,129,586.95/20,351.18
  6. Step 6: Final answer
    x = 15,730.27

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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.