Home / 12,520.29-18,780.12-5,122.92

Finding the Fourth Proportional to 12,520.29, 18,780.12 and 5,122.92

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Solution

The fourth proportional to 12,520.29, 18,780.12 and 5,122.92 is: 7,684.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.29 : 18,780.12 = 5,122.92 : x
  2. Step 2: Convert to fraction form
    12,520.29/18,780.12 = 5,122.92/x
  3. Step 3: Cross multiply
    12,520.29x = 18,780.12 × 5,122.92
  4. Step 4: Simplify right side
    12,520.29x = 96,209,052.35
  5. Step 5: Solve for x
    x = 96,209,052.35/12,520.29
  6. Step 6: Final answer
    x = 7,684.25

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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.