Home / 15,857.60-21,876.36-11,878.88

Finding the Fourth Proportional to 15,857.60, 21,876.36 and 11,878.88

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Solution

The fourth proportional to 15,857.60, 21,876.36 and 11,878.88 is: 16,387.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.60 : 21,876.36 = 11,878.88 : x
  2. Step 2: Convert to fraction form
    15,857.60/21,876.36 = 11,878.88/x
  3. Step 3: Cross multiply
    15,857.60x = 21,876.36 × 11,878.88
  4. Step 4: Simplify right side
    15,857.60x = 259,866,655.28
  5. Step 5: Solve for x
    x = 259,866,655.28/15,857.60
  6. Step 6: Final answer
    x = 16,387.51

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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.