Home / 11,515.20-15,889.44-6,734.40

Finding the Fourth Proportional to 11,515.20, 15,889.44 and 6,734.40

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Solution

The fourth proportional to 11,515.20, 15,889.44 and 6,734.40 is: 9,292.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.20 : 15,889.44 = 6,734.40 : x
  2. Step 2: Convert to fraction form
    11,515.20/15,889.44 = 6,734.40/x
  3. Step 3: Cross multiply
    11,515.20x = 15,889.44 × 6,734.40
  4. Step 4: Simplify right side
    11,515.20x = 107,005,844.74
  5. Step 5: Solve for x
    x = 107,005,844.74/11,515.20
  6. Step 6: Final answer
    x = 9,292.57

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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.