Home / 20,422.40-28,177.88-12,461.72

Finding the Fourth Proportional to 20,422.40, 28,177.88 and 12,461.72

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Solution

The fourth proportional to 20,422.40, 28,177.88 and 12,461.72 is: 17,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.40 : 28,177.88 = 12,461.72 : x
  2. Step 2: Convert to fraction form
    20,422.40/28,177.88 = 12,461.72/x
  3. Step 3: Cross multiply
    20,422.40x = 28,177.88 × 12,461.72
  4. Step 4: Simplify right side
    20,422.40x = 351,144,647.56
  5. Step 5: Solve for x
    x = 351,144,647.56/20,422.40
  6. Step 6: Final answer
    x = 17,194.10

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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.