Home / 19,615.20-29,422.80-13,394.40

Finding the Fourth Proportional to 19,615.20, 29,422.80 and 13,394.40

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Solution

The fourth proportional to 19,615.20, 29,422.80 and 13,394.40 is: 20,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,615.20 : 29,422.80 = 13,394.40 : x
  2. Step 2: Convert to fraction form
    19,615.20/29,422.80 = 13,394.40/x
  3. Step 3: Cross multiply
    19,615.20x = 29,422.80 × 13,394.40
  4. Step 4: Simplify right side
    19,615.20x = 394,100,752.32
  5. Step 5: Solve for x
    x = 394,100,752.32/19,615.20
  6. Step 6: Final answer
    x = 20,091.60

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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.