Home / 28,919.90-43,343.40-25,785.20

Finding the Fourth Proportional to 28,919.90, 43,343.40 and 25,785.20

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Solution

The fourth proportional to 28,919.90, 43,343.40 and 25,785.20 is: 38,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.90 : 43,343.40 = 25,785.20 : x
  2. Step 2: Convert to fraction form
    28,919.90/43,343.40 = 25,785.20/x
  3. Step 3: Cross multiply
    28,919.90x = 43,343.40 × 25,785.20
  4. Step 4: Simplify right side
    28,919.90x = 1,117,618,237.68
  5. Step 5: Solve for x
    x = 1,117,618,237.68/28,919.90
  6. Step 6: Final answer
    x = 38,645.30

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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.