Home / 20,514.78-28,305.18-12,554.10

Finding the Fourth Proportional to 20,514.78, 28,305.18 and 12,554.10

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Solution

The fourth proportional to 20,514.78, 28,305.18 and 12,554.10 is: 17,321.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,514.78 : 28,305.18 = 12,554.10 : x
  2. Step 2: Convert to fraction form
    20,514.78/28,305.18 = 12,554.10/x
  3. Step 3: Cross multiply
    20,514.78x = 28,305.18 × 12,554.10
  4. Step 4: Simplify right side
    20,514.78x = 355,346,060.24
  5. Step 5: Solve for x
    x = 355,346,060.24/20,514.78
  6. Step 6: Final answer
    x = 17,321.47

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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.