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Finding the Fourth Proportional to 20,240.70, 30,312.45 and 16,352.70

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Solution

The fourth proportional to 20,240.70, 30,312.45 and 16,352.70 is: 24,489.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.70 : 30,312.45 = 16,352.70 : x
  2. Step 2: Convert to fraction form
    20,240.70/30,312.45 = 16,352.70/x
  3. Step 3: Cross multiply
    20,240.70x = 30,312.45 × 16,352.70
  4. Step 4: Simplify right side
    20,240.70x = 495,690,401.12
  5. Step 5: Solve for x
    x = 495,690,401.12/20,240.70
  6. Step 6: Final answer
    x = 24,489.79

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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.