Home / 14,138.10-21,207.15-13,425.30

Finding the Fourth Proportional to 14,138.10, 21,207.15 and 13,425.30

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Solution

The fourth proportional to 14,138.10, 21,207.15 and 13,425.30 is: 20,137.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.10 : 21,207.15 = 13,425.30 : x
  2. Step 2: Convert to fraction form
    14,138.10/21,207.15 = 13,425.30/x
  3. Step 3: Cross multiply
    14,138.10x = 21,207.15 × 13,425.30
  4. Step 4: Simplify right side
    14,138.10x = 284,712,350.90
  5. Step 5: Solve for x
    x = 284,712,350.90/14,138.10
  6. Step 6: Final answer
    x = 20,137.95

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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.