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Finding the Fourth Proportional to 20,330.73, 28,053 and 11,378.34

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Solution

The fourth proportional to 20,330.73, 28,053 and 11,378.34 is: 15,700.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.73 : 28,053 = 11,378.34 : x
  2. Step 2: Convert to fraction form
    20,330.73/28,053 = 11,378.34/x
  3. Step 3: Cross multiply
    20,330.73x = 28,053 × 11,378.34
  4. Step 4: Simplify right side
    20,330.73x = 319,196,572.02
  5. Step 5: Solve for x
    x = 319,196,572.02/20,330.73
  6. Step 6: Final answer
    x = 15,700.20

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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.