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Finding the Fourth Proportional to 14,605.92, 20,156.13 and 7,891.54

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Solution

The fourth proportional to 14,605.92, 20,156.13 and 7,891.54 is: 10,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,605.92 : 20,156.13 = 7,891.54 : x
  2. Step 2: Convert to fraction form
    14,605.92/20,156.13 = 7,891.54/x
  3. Step 3: Cross multiply
    14,605.92x = 20,156.13 × 7,891.54
  4. Step 4: Simplify right side
    14,605.92x = 159,062,855.75
  5. Step 5: Solve for x
    x = 159,062,855.75/14,605.92
  6. Step 6: Final answer
    x = 10,890.30

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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.