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Finding the Fourth Proportional to 15,949.22, 22,009.76 and 8,778.90

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Solution

The fourth proportional to 15,949.22, 22,009.76 and 8,778.90 is: 12,114.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,949.22 : 22,009.76 = 8,778.90 : x
  2. Step 2: Convert to fraction form
    15,949.22/22,009.76 = 8,778.90/x
  3. Step 3: Cross multiply
    15,949.22x = 22,009.76 × 8,778.90
  4. Step 4: Simplify right side
    15,949.22x = 193,221,482.06
  5. Step 5: Solve for x
    x = 193,221,482.06/15,949.22
  6. Step 6: Final answer
    x = 12,114.79

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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.