Home / 12,990.20-19,480.49-4,667.97

Finding the Fourth Proportional to 12,990.20, 19,480.49 and 4,667.97

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Solution

The fourth proportional to 12,990.20, 19,480.49 and 4,667.97 is: 7,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.20 : 19,480.49 = 4,667.97 : x
  2. Step 2: Convert to fraction form
    12,990.20/19,480.49 = 4,667.97/x
  3. Step 3: Cross multiply
    12,990.20x = 19,480.49 × 4,667.97
  4. Step 4: Simplify right side
    12,990.20x = 90,934,319.57
  5. Step 5: Solve for x
    x = 90,934,319.57/12,990.20
  6. Step 6: Final answer
    x = 7,000.23

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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.