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Finding the Fourth Proportional to 20,654.56, 30,988.86 and 7,507.99

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Solution

The fourth proportional to 20,654.56, 30,988.86 and 7,507.99 is: 11,264.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.56 : 30,988.86 = 7,507.99 : x
  2. Step 2: Convert to fraction form
    20,654.56/30,988.86 = 7,507.99/x
  3. Step 3: Cross multiply
    20,654.56x = 30,988.86 × 7,507.99
  4. Step 4: Simplify right side
    20,654.56x = 232,664,050.99
  5. Step 5: Solve for x
    x = 232,664,050.99/20,654.56
  6. Step 6: Final answer
    x = 11,264.54

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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.