Home / 20,818.60-31,206.30-11,444.20

Finding the Fourth Proportional to 20,818.60, 31,206.30 and 11,444.20

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Solution

The fourth proportional to 20,818.60, 31,206.30 and 11,444.20 is: 17,154.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.60 : 31,206.30 = 11,444.20 : x
  2. Step 2: Convert to fraction form
    20,818.60/31,206.30 = 11,444.20/x
  3. Step 3: Cross multiply
    20,818.60x = 31,206.30 × 11,444.20
  4. Step 4: Simplify right side
    20,818.60x = 357,131,138.46
  5. Step 5: Solve for x
    x = 357,131,138.46/20,818.60
  6. Step 6: Final answer
    x = 17,154.43

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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.