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Finding the Fourth Proportional to 11,394.72, 15,720.28 and 6,916.84

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Solution

The fourth proportional to 11,394.72, 15,720.28 and 6,916.84 is: 9,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,394.72 : 15,720.28 = 6,916.84 : x
  2. Step 2: Convert to fraction form
    11,394.72/15,720.28 = 6,916.84/x
  3. Step 3: Cross multiply
    11,394.72x = 15,720.28 × 6,916.84
  4. Step 4: Simplify right side
    11,394.72x = 108,734,661.52
  5. Step 5: Solve for x
    x = 108,734,661.52/11,394.72
  6. Step 6: Final answer
    x = 9,542.55

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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.