Home / 13,612.32-20,419.20-4,378.56

Finding the Fourth Proportional to 13,612.32, 20,419.20 and 4,378.56

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Solution

The fourth proportional to 13,612.32, 20,419.20 and 4,378.56 is: 6,568.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.32 : 20,419.20 = 4,378.56 : x
  2. Step 2: Convert to fraction form
    13,612.32/20,419.20 = 4,378.56/x
  3. Step 3: Cross multiply
    13,612.32x = 20,419.20 × 4,378.56
  4. Step 4: Simplify right side
    13,612.32x = 89,406,692.35
  5. Step 5: Solve for x
    x = 89,406,692.35/13,612.32
  6. Step 6: Final answer
    x = 6,568.07

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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.