Home / 20,945.52-28,905.05-11,385.50

Finding the Fourth Proportional to 20,945.52, 28,905.05 and 11,385.50

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Solution

The fourth proportional to 20,945.52, 28,905.05 and 11,385.50 is: 15,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.52 : 28,905.05 = 11,385.50 : x
  2. Step 2: Convert to fraction form
    20,945.52/28,905.05 = 11,385.50/x
  3. Step 3: Cross multiply
    20,945.52x = 28,905.05 × 11,385.50
  4. Step 4: Simplify right side
    20,945.52x = 329,098,330.71
  5. Step 5: Solve for x
    x = 329,098,330.71/20,945.52
  6. Step 6: Final answer
    x = 15,712.11

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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.