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Finding the Fourth Proportional to 18,747.76, 28,099.76 and 10,423.78

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Solution

The fourth proportional to 18,747.76, 28,099.76 and 10,423.78 is: 15,623.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.76 : 28,099.76 = 10,423.78 : x
  2. Step 2: Convert to fraction form
    18,747.76/28,099.76 = 10,423.78/x
  3. Step 3: Cross multiply
    18,747.76x = 28,099.76 × 10,423.78
  4. Step 4: Simplify right side
    18,747.76x = 292,905,716.29
  5. Step 5: Solve for x
    x = 292,905,716.29/18,747.76
  6. Step 6: Final answer
    x = 15,623.50

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1.5x scale

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.