Home / 8,920.28-12,309.95-5,143.43

Finding the Fourth Proportional to 8,920.28, 12,309.95 and 5,143.43

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Solution

The fourth proportional to 8,920.28, 12,309.95 and 5,143.43 is: 7,097.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.28 : 12,309.95 = 5,143.43 : x
  2. Step 2: Convert to fraction form
    8,920.28/12,309.95 = 5,143.43/x
  3. Step 3: Cross multiply
    8,920.28x = 12,309.95 × 5,143.43
  4. Step 4: Simplify right side
    8,920.28x = 63,315,366.13
  5. Step 5: Solve for x
    x = 63,315,366.13/8,920.28
  6. Step 6: Final answer
    x = 7,097.91

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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.