Home / 11,200.32-15,456.78-6,420.96

Finding the Fourth Proportional to 11,200.32, 15,456.78 and 6,420.96

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Solution

The fourth proportional to 11,200.32, 15,456.78 and 6,420.96 is: 8,861.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,200.32 : 15,456.78 = 6,420.96 : x
  2. Step 2: Convert to fraction form
    11,200.32/15,456.78 = 6,420.96/x
  3. Step 3: Cross multiply
    11,200.32x = 15,456.78 × 6,420.96
  4. Step 4: Simplify right side
    11,200.32x = 99,247,366.11
  5. Step 5: Solve for x
    x = 99,247,366.11/11,200.32
  6. Step 6: Final answer
    x = 8,861.12

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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.