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Finding the Fourth Proportional to 28,399.08, 42,604.88 and 8,679.18

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Solution

The fourth proportional to 28,399.08, 42,604.88 and 8,679.18 is: 13,020.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.08 : 42,604.88 = 8,679.18 : x
  2. Step 2: Convert to fraction form
    28,399.08/42,604.88 = 8,679.18/x
  3. Step 3: Cross multiply
    28,399.08x = 42,604.88 × 8,679.18
  4. Step 4: Simplify right side
    28,399.08x = 369,775,422.40
  5. Step 5: Solve for x
    x = 369,775,422.40/28,399.08
  6. Step 6: Final answer
    x = 13,020.68

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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.