Home / 15,128.03-20,868.16-9,076.70

Finding the Fourth Proportional to 15,128.03, 20,868.16 and 9,076.70

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Solution

The fourth proportional to 15,128.03, 20,868.16 and 9,076.70 is: 12,520.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.03 : 20,868.16 = 9,076.70 : x
  2. Step 2: Convert to fraction form
    15,128.03/20,868.16 = 9,076.70/x
  3. Step 3: Cross multiply
    15,128.03x = 20,868.16 × 9,076.70
  4. Step 4: Simplify right side
    15,128.03x = 189,414,116.48
  5. Step 5: Solve for x
    x = 189,414,116.48/15,128.03
  6. Step 6: Final answer
    x = 12,520.74

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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.