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Finding the Fourth Proportional to 15,999.78, 22,079.76 and 8,926.50

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Solution

The fourth proportional to 15,999.78, 22,079.76 and 8,926.50 is: 12,318.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.78 : 22,079.76 = 8,926.50 : x
  2. Step 2: Convert to fraction form
    15,999.78/22,079.76 = 8,926.50/x
  3. Step 3: Cross multiply
    15,999.78x = 22,079.76 × 8,926.50
  4. Step 4: Simplify right side
    15,999.78x = 197,094,977.64
  5. Step 5: Solve for x
    x = 197,094,977.64/15,999.78
  6. Step 6: Final answer
    x = 12,318.61

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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.