Home / 15,829.13-21,843.31-8,657.61

Finding the Fourth Proportional to 15,829.13, 21,843.31 and 8,657.61

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Solution

The fourth proportional to 15,829.13, 21,843.31 and 8,657.61 is: 11,947.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,829.13 : 21,843.31 = 8,657.61 : x
  2. Step 2: Convert to fraction form
    15,829.13/21,843.31 = 8,657.61/x
  3. Step 3: Cross multiply
    15,829.13x = 21,843.31 × 8,657.61
  4. Step 4: Simplify right side
    15,829.13x = 189,110,837.45
  5. Step 5: Solve for x
    x = 189,110,837.45/15,829.13
  6. Step 6: Final answer
    x = 11,947.01

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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.