Home / 13,742.39-20,615.06-4,380.21

Finding the Fourth Proportional to 13,742.39, 20,615.06 and 4,380.21

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Solution

The fourth proportional to 13,742.39, 20,615.06 and 4,380.21 is: 6,570.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.39 : 20,615.06 = 4,380.21 : x
  2. Step 2: Convert to fraction form
    13,742.39/20,615.06 = 4,380.21/x
  3. Step 3: Cross multiply
    13,742.39x = 20,615.06 × 4,380.21
  4. Step 4: Simplify right side
    13,742.39x = 90,298,302.91
  5. Step 5: Solve for x
    x = 90,298,302.91/13,742.39
  6. Step 6: Final answer
    x = 6,570.78

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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.