Home / 13,421.20-20,125.28-5,627.92

Finding the Fourth Proportional to 13,421.20, 20,125.28 and 5,627.92

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Solution

The fourth proportional to 13,421.20, 20,125.28 and 5,627.92 is: 8,439.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.20 : 20,125.28 = 5,627.92 : x
  2. Step 2: Convert to fraction form
    13,421.20/20,125.28 = 5,627.92/x
  3. Step 3: Cross multiply
    13,421.20x = 20,125.28 × 5,627.92
  4. Step 4: Simplify right side
    13,421.20x = 113,263,465.82
  5. Step 5: Solve for x
    x = 113,263,465.82/13,421.20
  6. Step 6: Final answer
    x = 8,439.15

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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.