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Finding the Fourth Proportional to 11,394.78, 15,726.15 and 6,919.26

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Solution

The fourth proportional to 11,394.78, 15,726.15 and 6,919.26 is: 9,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,394.78 : 15,726.15 = 6,919.26 : x
  2. Step 2: Convert to fraction form
    11,394.78/15,726.15 = 6,919.26/x
  3. Step 3: Cross multiply
    11,394.78x = 15,726.15 × 6,919.26
  4. Step 4: Simplify right side
    11,394.78x = 108,813,320.65
  5. Step 5: Solve for x
    x = 108,813,320.65/11,394.78
  6. Step 6: Final answer
    x = 9,549.40

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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.