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Finding the Fourth Proportional to 14,589.98, 20,132.72 and 8,620.48

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Solution

The fourth proportional to 14,589.98, 20,132.72 and 8,620.48 is: 11,895.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,589.98 : 20,132.72 = 8,620.48 : x
  2. Step 2: Convert to fraction form
    14,589.98/20,132.72 = 8,620.48/x
  3. Step 3: Cross multiply
    14,589.98x = 20,132.72 × 8,620.48
  4. Step 4: Simplify right side
    14,589.98x = 173,553,710.11
  5. Step 5: Solve for x
    x = 173,553,710.11/14,589.98
  6. Step 6: Final answer
    x = 11,895.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.