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Finding the Fourth Proportional to 15,989.82, 22,065.63 and 8,820.39

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Solution

The fourth proportional to 15,989.82, 22,065.63 and 8,820.39 is: 12,171.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,989.82 : 22,065.63 = 8,820.39 : x
  2. Step 2: Convert to fraction form
    15,989.82/22,065.63 = 8,820.39/x
  3. Step 3: Cross multiply
    15,989.82x = 22,065.63 × 8,820.39
  4. Step 4: Simplify right side
    15,989.82x = 194,627,462.20
  5. Step 5: Solve for x
    x = 194,627,462.20/15,989.82
  6. Step 6: Final answer
    x = 12,171.96

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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.