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Finding the Fourth Proportional to 15,844.28, 21,864.78 and 8,770.28

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Solution

The fourth proportional to 15,844.28, 21,864.78 and 8,770.28 is: 12,102.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,844.28 : 21,864.78 = 8,770.28 : x
  2. Step 2: Convert to fraction form
    15,844.28/21,864.78 = 8,770.28/x
  3. Step 3: Cross multiply
    15,844.28x = 21,864.78 × 8,770.28
  4. Step 4: Simplify right side
    15,844.28x = 191,760,242.74
  5. Step 5: Solve for x
    x = 191,760,242.74/15,844.28
  6. Step 6: Final answer
    x = 12,102.81

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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.