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Finding the Fourth Proportional to 20,487.51, 30,734.49 and 7,339.59

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Solution

The fourth proportional to 20,487.51, 30,734.49 and 7,339.59 is: 11,010.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.51 : 30,734.49 = 7,339.59 : x
  2. Step 2: Convert to fraction form
    20,487.51/30,734.49 = 7,339.59/x
  3. Step 3: Cross multiply
    20,487.51x = 30,734.49 × 7,339.59
  4. Step 4: Simplify right side
    20,487.51x = 225,578,555.46
  5. Step 5: Solve for x
    x = 225,578,555.46/20,487.51
  6. Step 6: Final answer
    x = 11,010.54

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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.