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Finding the Fourth Proportional to 8,437.88, 12,658.65 and 4,280.15

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Solution

The fourth proportional to 8,437.88, 12,658.65 and 4,280.15 is: 6,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,437.88 : 12,658.65 = 4,280.15 : x
  2. Step 2: Convert to fraction form
    8,437.88/12,658.65 = 4,280.15/x
  3. Step 3: Cross multiply
    8,437.88x = 12,658.65 × 4,280.15
  4. Step 4: Simplify right side
    8,437.88x = 54,180,936.39
  5. Step 5: Solve for x
    x = 54,180,936.39/8,437.88
  6. Step 6: Final answer
    x = 6,421.15

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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.