Home / 8,897.65-12,279.99-5,120.80

Finding the Fourth Proportional to 8,897.65, 12,279.99 and 5,120.80

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Solution

The fourth proportional to 8,897.65, 12,279.99 and 5,120.80 is: 7,067.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.65 : 12,279.99 = 5,120.80 : x
  2. Step 2: Convert to fraction form
    8,897.65/12,279.99 = 5,120.80/x
  3. Step 3: Cross multiply
    8,897.65x = 12,279.99 × 5,120.80
  4. Step 4: Simplify right side
    8,897.65x = 62,883,372.79
  5. Step 5: Solve for x
    x = 62,883,372.79/8,897.65
  6. Step 6: Final answer
    x = 7,067.41

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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.