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Finding the Fourth Proportional to 13,290.32, 19,936.32 and 7,442.48

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Solution

The fourth proportional to 13,290.32, 19,936.32 and 7,442.48 is: 11,164.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.32 : 19,936.32 = 7,442.48 : x
  2. Step 2: Convert to fraction form
    13,290.32/19,936.32 = 7,442.48/x
  3. Step 3: Cross multiply
    13,290.32x = 19,936.32 × 7,442.48
  4. Step 4: Simplify right side
    13,290.32x = 148,375,662.87
  5. Step 5: Solve for x
    x = 148,375,662.87/13,290.32
  6. Step 6: Final answer
    x = 11,164.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.