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Finding the Fourth Proportional to 17,818.80, 26,721.90 and 6,129.30

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Solution

The fourth proportional to 17,818.80, 26,721.90 and 6,129.30 is: 9,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,818.80 : 26,721.90 = 6,129.30 : x
  2. Step 2: Convert to fraction form
    17,818.80/26,721.90 = 6,129.30/x
  3. Step 3: Cross multiply
    17,818.80x = 26,721.90 × 6,129.30
  4. Step 4: Simplify right side
    17,818.80x = 163,786,541.67
  5. Step 5: Solve for x
    x = 163,786,541.67/17,818.80
  6. Step 6: Final answer
    x = 9,191.78

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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.