Home / 8,425.12-12,623.70-5,128.24

Finding the Fourth Proportional to 8,425.12, 12,623.70 and 5,128.24

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Solution

The fourth proportional to 8,425.12, 12,623.70 and 5,128.24 is: 7,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.12 : 12,623.70 = 5,128.24 : x
  2. Step 2: Convert to fraction form
    8,425.12/12,623.70 = 5,128.24/x
  3. Step 3: Cross multiply
    8,425.12x = 12,623.70 × 5,128.24
  4. Step 4: Simplify right side
    8,425.12x = 64,737,363.29
  5. Step 5: Solve for x
    x = 64,737,363.29/8,425.12
  6. Step 6: Final answer
    x = 7,683.85

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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.