Home / 20,331.28-28,019.01-13,959.82

Finding the Fourth Proportional to 20,331.28, 28,019.01 and 13,959.82

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Solution

The fourth proportional to 20,331.28, 28,019.01 and 13,959.82 is: 19,238.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.28 : 28,019.01 = 13,959.82 : x
  2. Step 2: Convert to fraction form
    20,331.28/28,019.01 = 13,959.82/x
  3. Step 3: Cross multiply
    20,331.28x = 28,019.01 × 13,959.82
  4. Step 4: Simplify right side
    20,331.28x = 391,140,336.18
  5. Step 5: Solve for x
    x = 391,140,336.18/20,331.28
  6. Step 6: Final answer
    x = 19,238.35

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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.