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Finding the Fourth Proportional to 8,658.68, 12,987.21 and 3,727.40

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Solution

The fourth proportional to 8,658.68, 12,987.21 and 3,727.40 is: 5,590.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.68 : 12,987.21 = 3,727.40 : x
  2. Step 2: Convert to fraction form
    8,658.68/12,987.21 = 3,727.40/x
  3. Step 3: Cross multiply
    8,658.68x = 12,987.21 × 3,727.40
  4. Step 4: Simplify right side
    8,658.68x = 48,408,526.55
  5. Step 5: Solve for x
    x = 48,408,526.55/8,658.68
  6. Step 6: Final answer
    x = 5,590.75

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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.