Home / 15,278.56-21,084.78-8,472.45

Finding the Fourth Proportional to 15,278.56, 21,084.78 and 8,472.45

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Solution

The fourth proportional to 15,278.56, 21,084.78 and 8,472.45 is: 11,692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.56 : 21,084.78 = 8,472.45 : x
  2. Step 2: Convert to fraction form
    15,278.56/21,084.78 = 8,472.45/x
  3. Step 3: Cross multiply
    15,278.56x = 21,084.78 × 8,472.45
  4. Step 4: Simplify right side
    15,278.56x = 178,639,744.31
  5. Step 5: Solve for x
    x = 178,639,744.31/15,278.56
  6. Step 6: Final answer
    x = 11,692.18

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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.