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Finding the Fourth Proportional to 21,388.49, 32,086.55 and 7,344.89

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Solution

The fourth proportional to 21,388.49, 32,086.55 and 7,344.89 is: 11,018.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.49 : 32,086.55 = 7,344.89 : x
  2. Step 2: Convert to fraction form
    21,388.49/32,086.55 = 7,344.89/x
  3. Step 3: Cross multiply
    21,388.49x = 32,086.55 × 7,344.89
  4. Step 4: Simplify right side
    21,388.49x = 235,672,180.23
  5. Step 5: Solve for x
    x = 235,672,180.23/21,388.49
  6. Step 6: Final answer
    x = 11,018.65

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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.