Home / 20,649.85-30,818.72-18,656.95

Finding the Fourth Proportional to 20,649.85, 30,818.72 and 18,656.95

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Solution

The fourth proportional to 20,649.85, 30,818.72 and 18,656.95 is: 27,844.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.85 : 30,818.72 = 18,656.95 : x
  2. Step 2: Convert to fraction form
    20,649.85/30,818.72 = 18,656.95/x
  3. Step 3: Cross multiply
    20,649.85x = 30,818.72 × 18,656.95
  4. Step 4: Simplify right side
    20,649.85x = 574,983,318.10
  5. Step 5: Solve for x
    x = 574,983,318.10/20,649.85
  6. Step 6: Final answer
    x = 27,844.43

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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.