Home / 13,400.90-20,101.35-5,615.30

Finding the Fourth Proportional to 13,400.90, 20,101.35 and 5,615.30

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Solution

The fourth proportional to 13,400.90, 20,101.35 and 5,615.30 is: 8,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.90 : 20,101.35 = 5,615.30 : x
  2. Step 2: Convert to fraction form
    13,400.90/20,101.35 = 5,615.30/x
  3. Step 3: Cross multiply
    13,400.90x = 20,101.35 × 5,615.30
  4. Step 4: Simplify right side
    13,400.90x = 112,875,110.66
  5. Step 5: Solve for x
    x = 112,875,110.66/13,400.90
  6. Step 6: Final answer
    x = 8,422.95

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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.