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Finding the Fourth Proportional to 18,839.80, 28,266.90 and 8,444.08

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Solution

The fourth proportional to 18,839.80, 28,266.90 and 8,444.08 is: 12,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,839.80 : 28,266.90 = 8,444.08 : x
  2. Step 2: Convert to fraction form
    18,839.80/28,266.90 = 8,444.08/x
  3. Step 3: Cross multiply
    18,839.80x = 28,266.90 × 8,444.08
  4. Step 4: Simplify right side
    18,839.80x = 238,687,964.95
  5. Step 5: Solve for x
    x = 238,687,964.95/18,839.80
  6. Step 6: Final answer
    x = 12,669.35

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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.