Home / 10,319.20-15,478.80-4,158.88

Finding the Fourth Proportional to 10,319.20, 15,478.80 and 4,158.88

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Solution

The fourth proportional to 10,319.20, 15,478.80 and 4,158.88 is: 6,238.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,319.20 : 15,478.80 = 4,158.88 : x
  2. Step 2: Convert to fraction form
    10,319.20/15,478.80 = 4,158.88/x
  3. Step 3: Cross multiply
    10,319.20x = 15,478.80 × 4,158.88
  4. Step 4: Simplify right side
    10,319.20x = 64,374,373.56
  5. Step 5: Solve for x
    x = 64,374,373.56/10,319.20
  6. Step 6: Final answer
    x = 6,238.31

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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.