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Finding the Fourth Proportional to 15,278.88, 21,078.17 and 10,806.46

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Solution

The fourth proportional to 15,278.88, 21,078.17 and 10,806.46 is: 14,908.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.88 : 21,078.17 = 10,806.46 : x
  2. Step 2: Convert to fraction form
    15,278.88/21,078.17 = 10,806.46/x
  3. Step 3: Cross multiply
    15,278.88x = 21,078.17 × 10,806.46
  4. Step 4: Simplify right side
    15,278.88x = 227,780,346.95
  5. Step 5: Solve for x
    x = 227,780,346.95/15,278.88
  6. Step 6: Final answer
    x = 14,908.19

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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.