Home / 8,317.64-12,478.18-3,387.28

Finding the Fourth Proportional to 8,317.64, 12,478.18 and 3,387.28

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Solution

The fourth proportional to 8,317.64, 12,478.18 and 3,387.28 is: 5,081.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,317.64 : 12,478.18 = 3,387.28 : x
  2. Step 2: Convert to fraction form
    8,317.64/12,478.18 = 3,387.28/x
  3. Step 3: Cross multiply
    8,317.64x = 12,478.18 × 3,387.28
  4. Step 4: Simplify right side
    8,317.64x = 42,267,089.55
  5. Step 5: Solve for x
    x = 42,267,089.55/8,317.64
  6. Step 6: Final answer
    x = 5,081.62

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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.