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Finding the Fourth Proportional to 18,757.17, 28,111.15 and 10,432.90

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Solution

The fourth proportional to 18,757.17, 28,111.15 and 10,432.90 is: 15,635.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.17 : 28,111.15 = 10,432.90 : x
  2. Step 2: Convert to fraction form
    18,757.17/28,111.15 = 10,432.90/x
  3. Step 3: Cross multiply
    18,757.17x = 28,111.15 × 10,432.90
  4. Step 4: Simplify right side
    18,757.17x = 293,280,865.02
  5. Step 5: Solve for x
    x = 293,280,865.02/18,757.17
  6. Step 6: Final answer
    x = 15,635.67

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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.