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Finding the Fourth Proportional to 28,506.88, 42,766.62 and 9,786.49

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Solution

The fourth proportional to 28,506.88, 42,766.62 and 9,786.49 is: 14,681.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,506.88 : 42,766.62 = 9,786.49 : x
  2. Step 2: Convert to fraction form
    28,506.88/42,766.62 = 9,786.49/x
  3. Step 3: Cross multiply
    28,506.88x = 42,766.62 × 9,786.49
  4. Step 4: Simplify right side
    28,506.88x = 418,535,098.96
  5. Step 5: Solve for x
    x = 418,535,098.96/28,506.88
  6. Step 6: Final answer
    x = 14,681.90

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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.