Home / 8,391.38-12,582.50-5,429.40

Finding the Fourth Proportional to 8,391.38, 12,582.50 and 5,429.40

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Solution

The fourth proportional to 8,391.38, 12,582.50 and 5,429.40 is: 8,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.38 : 12,582.50 = 5,429.40 : x
  2. Step 2: Convert to fraction form
    8,391.38/12,582.50 = 5,429.40/x
  3. Step 3: Cross multiply
    8,391.38x = 12,582.50 × 5,429.40
  4. Step 4: Simplify right side
    8,391.38x = 68,315,425.50
  5. Step 5: Solve for x
    x = 68,315,425.50/8,391.38
  6. Step 6: Final answer
    x = 8,141.14

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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.