Home / 20,937.80-31,358.10-14,328.20

Finding the Fourth Proportional to 20,937.80, 31,358.10 and 14,328.20

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Solution

The fourth proportional to 20,937.80, 31,358.10 and 14,328.20 is: 21,459.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.80 : 31,358.10 = 14,328.20 : x
  2. Step 2: Convert to fraction form
    20,937.80/31,358.10 = 14,328.20/x
  3. Step 3: Cross multiply
    20,937.80x = 31,358.10 × 14,328.20
  4. Step 4: Simplify right side
    20,937.80x = 449,305,128.42
  5. Step 5: Solve for x
    x = 449,305,128.42/20,937.80
  6. Step 6: Final answer
    x = 21,459.04

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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.