Home / 20,377.80-30,427.28-18,255.76

Finding the Fourth Proportional to 20,377.80, 30,427.28 and 18,255.76

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Solution

The fourth proportional to 20,377.80, 30,427.28 and 18,255.76 is: 27,258.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.80 : 30,427.28 = 18,255.76 : x
  2. Step 2: Convert to fraction form
    20,377.80/30,427.28 = 18,255.76/x
  3. Step 3: Cross multiply
    20,377.80x = 30,427.28 × 18,255.76
  4. Step 4: Simplify right side
    20,377.80x = 555,473,121.13
  5. Step 5: Solve for x
    x = 555,473,121.13/20,377.80
  6. Step 6: Final answer
    x = 27,258.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.