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Finding the Fourth Proportional to 5,787.70, 8,681.55 and 5,423.20

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Solution

The fourth proportional to 5,787.70, 8,681.55 and 5,423.20 is: 8,134.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,787.70 : 8,681.55 = 5,423.20 : x
  2. Step 2: Convert to fraction form
    5,787.70/8,681.55 = 5,423.20/x
  3. Step 3: Cross multiply
    5,787.70x = 8,681.55 × 5,423.20
  4. Step 4: Simplify right side
    5,787.70x = 47,081,781.96
  5. Step 5: Solve for x
    x = 47,081,781.96/5,787.70
  6. Step 6: Final answer
    x = 8,134.80

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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.