Home / 10,578.36-15,869.16-2,787.78

Finding the Fourth Proportional to 10,578.36, 15,869.16 and 2,787.78

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Solution

The fourth proportional to 10,578.36, 15,869.16 and 2,787.78 is: 4,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,578.36 : 15,869.16 = 2,787.78 : x
  2. Step 2: Convert to fraction form
    10,578.36/15,869.16 = 2,787.78/x
  3. Step 3: Cross multiply
    10,578.36x = 15,869.16 × 2,787.78
  4. Step 4: Simplify right side
    10,578.36x = 44,239,726.86
  5. Step 5: Solve for x
    x = 44,239,726.86/10,578.36
  6. Step 6: Final answer
    x = 4,182.10

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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.