Home / 15,151.31-20,908.33-8,436.79

Finding the Fourth Proportional to 15,151.31, 20,908.33 and 8,436.79

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Solution

The fourth proportional to 15,151.31, 20,908.33 and 8,436.79 is: 11,642.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.31 : 20,908.33 = 8,436.79 : x
  2. Step 2: Convert to fraction form
    15,151.31/20,908.33 = 8,436.79/x
  3. Step 3: Cross multiply
    15,151.31x = 20,908.33 × 8,436.79
  4. Step 4: Simplify right side
    15,151.31x = 176,399,116.10
  5. Step 5: Solve for x
    x = 176,399,116.10/15,151.31
  6. Step 6: Final answer
    x = 11,642.50

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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.