Home / 11,152.50-15,390.44-6,436.78

Finding the Fourth Proportional to 11,152.50, 15,390.44 and 6,436.78

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Solution

The fourth proportional to 11,152.50, 15,390.44 and 6,436.78 is: 8,882.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,152.50 : 15,390.44 = 6,436.78 : x
  2. Step 2: Convert to fraction form
    11,152.50/15,390.44 = 6,436.78/x
  3. Step 3: Cross multiply
    11,152.50x = 15,390.44 × 6,436.78
  4. Step 4: Simplify right side
    11,152.50x = 99,064,844.20
  5. Step 5: Solve for x
    x = 99,064,844.20/11,152.50
  6. Step 6: Final answer
    x = 8,882.75

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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.