Home / 8,899.65-12,280.68-5,121.81

Finding the Fourth Proportional to 8,899.65, 12,280.68 and 5,121.81

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Solution

The fourth proportional to 8,899.65, 12,280.68 and 5,121.81 is: 7,067.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,899.65 : 12,280.68 = 5,121.81 : x
  2. Step 2: Convert to fraction form
    8,899.65/12,280.68 = 5,121.81/x
  3. Step 3: Cross multiply
    8,899.65x = 12,280.68 × 5,121.81
  4. Step 4: Simplify right side
    8,899.65x = 62,899,309.63
  5. Step 5: Solve for x
    x = 62,899,309.63/8,899.65
  6. Step 6: Final answer
    x = 7,067.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.