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Finding the Fourth Proportional to 20,510.73, 30,752.97 and 8,661.30

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Solution

The fourth proportional to 20,510.73, 30,752.97 and 8,661.30 is: 12,986.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.73 : 30,752.97 = 8,661.30 : x
  2. Step 2: Convert to fraction form
    20,510.73/30,752.97 = 8,661.30/x
  3. Step 3: Cross multiply
    20,510.73x = 30,752.97 × 8,661.30
  4. Step 4: Simplify right side
    20,510.73x = 266,360,699.06
  5. Step 5: Solve for x
    x = 266,360,699.06/20,510.73
  6. Step 6: Final answer
    x = 12,986.41

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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.