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Finding the Fourth Proportional to 15,278.94, 22,921.11 and 7,881.39

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Solution

The fourth proportional to 15,278.94, 22,921.11 and 7,881.39 is: 11,823.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.94 : 22,921.11 = 7,881.39 : x
  2. Step 2: Convert to fraction form
    15,278.94/22,921.11 = 7,881.39/x
  3. Step 3: Cross multiply
    15,278.94x = 22,921.11 × 7,881.39
  4. Step 4: Simplify right side
    15,278.94x = 180,650,207.14
  5. Step 5: Solve for x
    x = 180,650,207.14/15,278.94
  6. Step 6: Final answer
    x = 11,823.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.