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Finding the Fourth Proportional to 20,486.51, 30,732.99 and 7,338.59

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Solution

The fourth proportional to 20,486.51, 30,732.99 and 7,338.59 is: 11,009.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.51 : 30,732.99 = 7,338.59 : x
  2. Step 2: Convert to fraction form
    20,486.51/30,732.99 = 7,338.59/x
  3. Step 3: Cross multiply
    20,486.51x = 30,732.99 × 7,338.59
  4. Step 4: Simplify right side
    20,486.51x = 225,536,659.42
  5. Step 5: Solve for x
    x = 225,536,659.42/20,486.51
  6. Step 6: Final answer
    x = 11,009.04

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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.