Home / 15,712.97-21,684.32-8,543.36

Finding the Fourth Proportional to 15,712.97, 21,684.32 and 8,543.36

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Solution

The fourth proportional to 15,712.97, 21,684.32 and 8,543.36 is: 11,790.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.97 : 21,684.32 = 8,543.36 : x
  2. Step 2: Convert to fraction form
    15,712.97/21,684.32 = 8,543.36/x
  3. Step 3: Cross multiply
    15,712.97x = 21,684.32 × 8,543.36
  4. Step 4: Simplify right side
    15,712.97x = 185,256,800.98
  5. Step 5: Solve for x
    x = 185,256,800.98/15,712.97
  6. Step 6: Final answer
    x = 11,790.06

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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.