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Finding the Fourth Proportional to 15,478.61, 23,221.16 and 8,081.08

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Solution

The fourth proportional to 15,478.61, 23,221.16 and 8,081.08 is: 12,123.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.61 : 23,221.16 = 8,081.08 : x
  2. Step 2: Convert to fraction form
    15,478.61/23,221.16 = 8,081.08/x
  3. Step 3: Cross multiply
    15,478.61x = 23,221.16 × 8,081.08
  4. Step 4: Simplify right side
    15,478.61x = 187,651,993.43
  5. Step 5: Solve for x
    x = 187,651,993.43/15,478.61
  6. Step 6: Final answer
    x = 12,123.31

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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.