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Finding the Fourth Proportional to 11,155.95, 15,393.92 and 6,679.08

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Solution

The fourth proportional to 11,155.95, 15,393.92 and 6,679.08 is: 9,216.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.95 : 15,393.92 = 6,679.08 : x
  2. Step 2: Convert to fraction form
    11,155.95/15,393.92 = 6,679.08/x
  3. Step 3: Cross multiply
    11,155.95x = 15,393.92 × 6,679.08
  4. Step 4: Simplify right side
    11,155.95x = 102,817,189.80
  5. Step 5: Solve for x
    x = 102,817,189.80/11,155.95
  6. Step 6: Final answer
    x = 9,216.35

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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.