Home / 20,128.15-30,192.13-17,138.76

Finding the Fourth Proportional to 20,128.15, 30,192.13 and 17,138.76

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Solution

The fourth proportional to 20,128.15, 30,192.13 and 17,138.76 is: 25,708.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.15 : 30,192.13 = 17,138.76 : x
  2. Step 2: Convert to fraction form
    20,128.15/30,192.13 = 17,138.76/x
  3. Step 3: Cross multiply
    20,128.15x = 30,192.13 × 17,138.76
  4. Step 4: Simplify right side
    20,128.15x = 517,455,669.96
  5. Step 5: Solve for x
    x = 517,455,669.96/20,128.15
  6. Step 6: Final answer
    x = 25,708.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.