Home / 20,785.12-28,712.40-18,546.24

Finding the Fourth Proportional to 20,785.12, 28,712.40 and 18,546.24

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Solution

The fourth proportional to 20,785.12, 28,712.40 and 18,546.24 is: 25,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.12 : 28,712.40 = 18,546.24 : x
  2. Step 2: Convert to fraction form
    20,785.12/28,712.40 = 18,546.24/x
  3. Step 3: Cross multiply
    20,785.12x = 28,712.40 × 18,546.24
  4. Step 4: Simplify right side
    20,785.12x = 532,507,061.38
  5. Step 5: Solve for x
    x = 532,507,061.38/20,785.12
  6. Step 6: Final answer
    x = 25,619.63

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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.