Home / 18,988,649.28-28,486,568.16-7,629,986.88

Finding the Fourth Proportional to 18,988,649.28, 28,486,568.16 and 7,629,986.88

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Solution

The fourth proportional to 18,988,649.28, 28,486,568.16 and 7,629,986.88 is: 11,446,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988,649.28 : 28,486,568.16 = 7,629,986.88 : x
  2. Step 2: Convert to fraction form
    18,988,649.28/28,486,568.16 = 7,629,986.88/x
  3. Step 3: Cross multiply
    18,988,649.28x = 28,486,568.16 × 7,629,986.88
  4. Step 4: Simplify right side
    18,988,649.28x = 217,352,141,317,025.75
  5. Step 5: Solve for x
    x = 217,352,141,317,025.75/18,988,649.28
  6. Step 6: Final answer
    x = 11,446,424.55

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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.