Home / 15,128.64-20,876.85-8,754.21

Finding the Fourth Proportional to 15,128.64, 20,876.85 and 8,754.21

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Solution

The fourth proportional to 15,128.64, 20,876.85 and 8,754.21 is: 12,080.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.64 : 20,876.85 = 8,754.21 : x
  2. Step 2: Convert to fraction form
    15,128.64/20,876.85 = 8,754.21/x
  3. Step 3: Cross multiply
    15,128.64x = 20,876.85 × 8,754.21
  4. Step 4: Simplify right side
    15,128.64x = 182,760,329.04
  5. Step 5: Solve for x
    x = 182,760,329.04/15,128.64
  6. Step 6: Final answer
    x = 12,080.42

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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.