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Finding the Fourth Proportional to 11,588.20, 15,999.78 and 7,340.20

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Solution

The fourth proportional to 11,588.20, 15,999.78 and 7,340.20 is: 10,134.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,588.20 : 15,999.78 = 7,340.20 : x
  2. Step 2: Convert to fraction form
    11,588.20/15,999.78 = 7,340.20/x
  3. Step 3: Cross multiply
    11,588.20x = 15,999.78 × 7,340.20
  4. Step 4: Simplify right side
    11,588.20x = 117,441,585.16
  5. Step 5: Solve for x
    x = 117,441,585.16/11,588.20
  6. Step 6: Final answer
    x = 10,134.58

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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.