Home / 15,713.13-21,684.29-8,639.54

Finding the Fourth Proportional to 15,713.13, 21,684.29 and 8,639.54

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Solution

The fourth proportional to 15,713.13, 21,684.29 and 8,639.54 is: 11,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.13 : 21,684.29 = 8,639.54 : x
  2. Step 2: Convert to fraction form
    15,713.13/21,684.29 = 8,639.54/x
  3. Step 3: Cross multiply
    15,713.13x = 21,684.29 × 8,639.54
  4. Step 4: Simplify right side
    15,713.13x = 187,342,139.21
  5. Step 5: Solve for x
    x = 187,342,139.21/15,713.13
  6. Step 6: Final answer
    x = 11,922.65

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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.