Home / 13,422.20-20,102.15-12,955.13

Finding the Fourth Proportional to 13,422.20, 20,102.15 and 12,955.13

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Solution

The fourth proportional to 13,422.20, 20,102.15 and 12,955.13 is: 19,402.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.20 : 20,102.15 = 12,955.13 : x
  2. Step 2: Convert to fraction form
    13,422.20/20,102.15 = 12,955.13/x
  3. Step 3: Cross multiply
    13,422.20x = 20,102.15 × 12,955.13
  4. Step 4: Simplify right side
    13,422.20x = 260,425,801.24
  5. Step 5: Solve for x
    x = 260,425,801.24/13,422.20
  6. Step 6: Final answer
    x = 19,402.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.