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Finding the Fourth Proportional to 28,589.85, 42,888.92 and 8,870.00

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Solution

The fourth proportional to 28,589.85, 42,888.92 and 8,870.00 is: 13,306.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,589.85 : 42,888.92 = 8,870.00 : x
  2. Step 2: Convert to fraction form
    28,589.85/42,888.92 = 8,870.00/x
  3. Step 3: Cross multiply
    28,589.85x = 42,888.92 × 8,870.00
  4. Step 4: Simplify right side
    28,589.85x = 380,424,461.61
  5. Step 5: Solve for x
    x = 380,424,461.61/28,589.85
  6. Step 6: Final answer
    x = 13,306.28

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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.