Home / 20,530.60-30,731.10-16,124.20

Finding the Fourth Proportional to 20,530.60, 30,731.10 and 16,124.20

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Solution

The fourth proportional to 20,530.60, 30,731.10 and 16,124.20 is: 24,135.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.60 : 30,731.10 = 16,124.20 : x
  2. Step 2: Convert to fraction form
    20,530.60/30,731.10 = 16,124.20/x
  3. Step 3: Cross multiply
    20,530.60x = 30,731.10 × 16,124.20
  4. Step 4: Simplify right side
    20,530.60x = 495,514,402.62
  5. Step 5: Solve for x
    x = 495,514,402.62/20,530.60
  6. Step 6: Final answer
    x = 24,135.41

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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.