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Finding the Fourth Proportional to 11,340.68, 15,651.21 and 6,865.55

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Solution

The fourth proportional to 11,340.68, 15,651.21 and 6,865.55 is: 9,475.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,340.68 : 15,651.21 = 6,865.55 : x
  2. Step 2: Convert to fraction form
    11,340.68/15,651.21 = 6,865.55/x
  3. Step 3: Cross multiply
    11,340.68x = 15,651.21 × 6,865.55
  4. Step 4: Simplify right side
    11,340.68x = 107,454,164.82
  5. Step 5: Solve for x
    x = 107,454,164.82/11,340.68
  6. Step 6: Final answer
    x = 9,475.11

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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.