Home / 8,780.88-12,114.54-5,242.80

Finding the Fourth Proportional to 8,780.88, 12,114.54 and 5,242.80

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Solution

The fourth proportional to 8,780.88, 12,114.54 and 5,242.80 is: 7,233.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.88 : 12,114.54 = 5,242.80 : x
  2. Step 2: Convert to fraction form
    8,780.88/12,114.54 = 5,242.80/x
  3. Step 3: Cross multiply
    8,780.88x = 12,114.54 × 5,242.80
  4. Step 4: Simplify right side
    8,780.88x = 63,514,110.31
  5. Step 5: Solve for x
    x = 63,514,110.31/8,780.88
  6. Step 6: Final answer
    x = 7,233.23

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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.