Home / 8,320.78-12,477.70-3,387.07

Finding the Fourth Proportional to 8,320.78, 12,477.70 and 3,387.07

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Solution

The fourth proportional to 8,320.78, 12,477.70 and 3,387.07 is: 5,079.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.78 : 12,477.70 = 3,387.07 : x
  2. Step 2: Convert to fraction form
    8,320.78/12,477.70 = 3,387.07/x
  3. Step 3: Cross multiply
    8,320.78x = 12,477.70 × 3,387.07
  4. Step 4: Simplify right side
    8,320.78x = 42,262,843.34
  5. Step 5: Solve for x
    x = 42,262,843.34/8,320.78
  6. Step 6: Final answer
    x = 5,079.19

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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.