Home / 8,920.50-12,310.29-5,383.71

Finding the Fourth Proportional to 8,920.50, 12,310.29 and 5,383.71

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Solution

The fourth proportional to 8,920.50, 12,310.29 and 5,383.71 is: 7,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.50 : 12,310.29 = 5,383.71 : x
  2. Step 2: Convert to fraction form
    8,920.50/12,310.29 = 5,383.71/x
  3. Step 3: Cross multiply
    8,920.50x = 12,310.29 × 5,383.71
  4. Step 4: Simplify right side
    8,920.50x = 66,275,031.38
  5. Step 5: Solve for x
    x = 66,275,031.38/8,920.50
  6. Step 6: Final answer
    x = 7,429.52

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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.