Home / 15,399.88-21,251.80-8,326.28

Finding the Fourth Proportional to 15,399.88, 21,251.80 and 8,326.28

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Solution

The fourth proportional to 15,399.88, 21,251.80 and 8,326.28 is: 11,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.88 : 21,251.80 = 8,326.28 : x
  2. Step 2: Convert to fraction form
    15,399.88/21,251.80 = 8,326.28/x
  3. Step 3: Cross multiply
    15,399.88x = 21,251.80 × 8,326.28
  4. Step 4: Simplify right side
    15,399.88x = 176,948,500.84
  5. Step 5: Solve for x
    x = 176,948,500.84/15,399.88
  6. Step 6: Final answer
    x = 11,490.25

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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.