Home / 20,422.89-28,164.85-13,245.30

Finding the Fourth Proportional to 20,422.89, 28,164.85 and 13,245.30

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Solution

The fourth proportional to 20,422.89, 28,164.85 and 13,245.30 is: 18,266.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.89 : 28,164.85 = 13,245.30 : x
  2. Step 2: Convert to fraction form
    20,422.89/28,164.85 = 13,245.30/x
  3. Step 3: Cross multiply
    20,422.89x = 28,164.85 × 13,245.30
  4. Step 4: Simplify right side
    20,422.89x = 373,051,854.59
  5. Step 5: Solve for x
    x = 373,051,854.59/20,422.89
  6. Step 6: Final answer
    x = 18,266.36

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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.