Home / 11,009.76-15,188.20-7,231.40

Finding the Fourth Proportional to 11,009.76, 15,188.20 and 7,231.40

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Solution

The fourth proportional to 11,009.76, 15,188.20 and 7,231.40 is: 9,975.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,009.76 : 15,188.20 = 7,231.40 : x
  2. Step 2: Convert to fraction form
    11,009.76/15,188.20 = 7,231.40/x
  3. Step 3: Cross multiply
    11,009.76x = 15,188.20 × 7,231.40
  4. Step 4: Simplify right side
    11,009.76x = 109,831,949.48
  5. Step 5: Solve for x
    x = 109,831,949.48/11,009.76
  6. Step 6: Final answer
    x = 9,975.87

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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.