Home / 20,581.95-28,403.10-11,150.52

Finding the Fourth Proportional to 20,581.95, 28,403.10 and 11,150.52

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Solution

The fourth proportional to 20,581.95, 28,403.10 and 11,150.52 is: 15,387.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.95 : 28,403.10 = 11,150.52 : x
  2. Step 2: Convert to fraction form
    20,581.95/28,403.10 = 11,150.52/x
  3. Step 3: Cross multiply
    20,581.95x = 28,403.10 × 11,150.52
  4. Step 4: Simplify right side
    20,581.95x = 316,709,334.61
  5. Step 5: Solve for x
    x = 316,709,334.61/20,581.95
  6. Step 6: Final answer
    x = 15,387.72

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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.