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Finding the Fourth Proportional to 28,399.84, 42,607.42 and 8,677.85

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Solution

The fourth proportional to 28,399.84, 42,607.42 and 8,677.85 is: 13,019.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.84 : 42,607.42 = 8,677.85 : x
  2. Step 2: Convert to fraction form
    28,399.84/42,607.42 = 8,677.85/x
  3. Step 3: Cross multiply
    28,399.84x = 42,607.42 × 8,677.85
  4. Step 4: Simplify right side
    28,399.84x = 369,740,799.65
  5. Step 5: Solve for x
    x = 369,740,799.65/28,399.84
  6. Step 6: Final answer
    x = 13,019.12

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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.