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Finding the Fourth Proportional to 8,691.70, 13,038.24 and 3,426.35

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Solution

The fourth proportional to 8,691.70, 13,038.24 and 3,426.35 is: 5,139.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.70 : 13,038.24 = 3,426.35 : x
  2. Step 2: Convert to fraction form
    8,691.70/13,038.24 = 3,426.35/x
  3. Step 3: Cross multiply
    8,691.70x = 13,038.24 × 3,426.35
  4. Step 4: Simplify right side
    8,691.70x = 44,673,573.62
  5. Step 5: Solve for x
    x = 44,673,573.62/8,691.70
  6. Step 6: Final answer
    x = 5,139.80

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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.