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Finding the Fourth Proportional to 15,087.06, 20,821.15 and 8,714.79

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Solution

The fourth proportional to 15,087.06, 20,821.15 and 8,714.79 is: 12,026.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.06 : 20,821.15 = 8,714.79 : x
  2. Step 2: Convert to fraction form
    15,087.06/20,821.15 = 8,714.79/x
  3. Step 3: Cross multiply
    15,087.06x = 20,821.15 × 8,714.79
  4. Step 4: Simplify right side
    15,087.06x = 181,451,960.70
  5. Step 5: Solve for x
    x = 181,451,960.70/15,087.06
  6. Step 6: Final answer
    x = 12,026.99

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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.