Home / 11,209.40-15,475.64-9,963.80

Finding the Fourth Proportional to 11,209.40, 15,475.64 and 9,963.80

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Solution

The fourth proportional to 11,209.40, 15,475.64 and 9,963.80 is: 13,755.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,209.40 : 15,475.64 = 9,963.80 : x
  2. Step 2: Convert to fraction form
    11,209.40/15,475.64 = 9,963.80/x
  3. Step 3: Cross multiply
    11,209.40x = 15,475.64 × 9,963.80
  4. Step 4: Simplify right side
    11,209.40x = 154,196,181.83
  5. Step 5: Solve for x
    x = 154,196,181.83/11,209.40
  6. Step 6: Final answer
    x = 13,755.97

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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.