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Finding the Fourth Proportional to 20,508.31, 30,751.53 and 10,623.07

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Solution

The fourth proportional to 20,508.31, 30,751.53 and 10,623.07 is: 15,928.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.31 : 30,751.53 = 10,623.07 : x
  2. Step 2: Convert to fraction form
    20,508.31/30,751.53 = 10,623.07/x
  3. Step 3: Cross multiply
    20,508.31x = 30,751.53 × 10,623.07
  4. Step 4: Simplify right side
    20,508.31x = 326,675,655.80
  5. Step 5: Solve for x
    x = 326,675,655.80/20,508.31
  6. Step 6: Final answer
    x = 15,928.94

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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.