Home / 20,479.98-28,254.65-11,979.39

Finding the Fourth Proportional to 20,479.98, 28,254.65 and 11,979.39

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Solution

The fourth proportional to 20,479.98, 28,254.65 and 11,979.39 is: 16,527.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.98 : 28,254.65 = 11,979.39 : x
  2. Step 2: Convert to fraction form
    20,479.98/28,254.65 = 11,979.39/x
  3. Step 3: Cross multiply
    20,479.98x = 28,254.65 × 11,979.39
  4. Step 4: Simplify right side
    20,479.98x = 338,473,471.66
  5. Step 5: Solve for x
    x = 338,473,471.66/20,479.98
  6. Step 6: Final answer
    x = 16,527.04

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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.