Home / 15,391.68-21,240.51-8,318.10

Finding the Fourth Proportional to 15,391.68, 21,240.51 and 8,318.10

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Solution

The fourth proportional to 15,391.68, 21,240.51 and 8,318.10 is: 11,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.68 : 21,240.51 = 8,318.10 : x
  2. Step 2: Convert to fraction form
    15,391.68/21,240.51 = 8,318.10/x
  3. Step 3: Cross multiply
    15,391.68x = 21,240.51 × 8,318.10
  4. Step 4: Simplify right side
    15,391.68x = 176,680,686.23
  5. Step 5: Solve for x
    x = 176,680,686.23/15,391.68
  6. Step 6: Final answer
    x = 11,478.97

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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.