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Finding the Fourth Proportional to 15,999.77, 22,079.70 and 8,926.20

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Solution

The fourth proportional to 15,999.77, 22,079.70 and 8,926.20 is: 12,318.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.77 : 22,079.70 = 8,926.20 : x
  2. Step 2: Convert to fraction form
    15,999.77/22,079.70 = 8,926.20/x
  3. Step 3: Cross multiply
    15,999.77x = 22,079.70 × 8,926.20
  4. Step 4: Simplify right side
    15,999.77x = 197,087,735.34
  5. Step 5: Solve for x
    x = 197,087,735.34/15,999.77
  6. Step 6: Final answer
    x = 12,318.16

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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.