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Finding the Fourth Proportional to 18,691.10, 28,036.71 and 5,543.58

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Solution

The fourth proportional to 18,691.10, 28,036.71 and 5,543.58 is: 8,315.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.10 : 28,036.71 = 5,543.58 : x
  2. Step 2: Convert to fraction form
    18,691.10/28,036.71 = 5,543.58/x
  3. Step 3: Cross multiply
    18,691.10x = 28,036.71 × 5,543.58
  4. Step 4: Simplify right side
    18,691.10x = 155,423,744.82
  5. Step 5: Solve for x
    x = 155,423,744.82/18,691.10
  6. Step 6: Final answer
    x = 8,315.39

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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.