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Finding the Fourth Proportional to 18,956, 28,432.80 and 7,403.52

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Solution

The fourth proportional to 18,956, 28,432.80 and 7,403.52 is: 11,104.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956 : 28,432.80 = 7,403.52 : x
  2. Step 2: Convert to fraction form
    18,956/28,432.80 = 7,403.52/x
  3. Step 3: Cross multiply
    18,956x = 28,432.80 × 7,403.52
  4. Step 4: Simplify right side
    18,956x = 210,502,803.46
  5. Step 5: Solve for x
    x = 210,502,803.46/18,956
  6. Step 6: Final answer
    x = 11,104.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.