Home / 11,369.25-15,685.11-7,118.55

Finding the Fourth Proportional to 11,369.25, 15,685.11 and 7,118.55

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Solution

The fourth proportional to 11,369.25, 15,685.11 and 7,118.55 is: 9,820.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,369.25 : 15,685.11 = 7,118.55 : x
  2. Step 2: Convert to fraction form
    11,369.25/15,685.11 = 7,118.55/x
  3. Step 3: Cross multiply
    11,369.25x = 15,685.11 × 7,118.55
  4. Step 4: Simplify right side
    11,369.25x = 111,655,239.79
  5. Step 5: Solve for x
    x = 111,655,239.79/11,369.25
  6. Step 6: Final answer
    x = 9,820.81

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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.