Home / 8,320.90-12,477.92-3,387.20

Finding the Fourth Proportional to 8,320.90, 12,477.92 and 3,387.20

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Solution

The fourth proportional to 8,320.90, 12,477.92 and 3,387.20 is: 5,079.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.90 : 12,477.92 = 3,387.20 : x
  2. Step 2: Convert to fraction form
    8,320.90/12,477.92 = 3,387.20/x
  3. Step 3: Cross multiply
    8,320.90x = 12,477.92 × 3,387.20
  4. Step 4: Simplify right side
    8,320.90x = 42,265,210.62
  5. Step 5: Solve for x
    x = 42,265,210.62/8,320.90
  6. Step 6: Final answer
    x = 5,079.40

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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.