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Finding the Fourth Proportional to 20,425.80, 30,638.70 and 6,574.80

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Solution

The fourth proportional to 20,425.80, 30,638.70 and 6,574.80 is: 9,862.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.80 : 30,638.70 = 6,574.80 : x
  2. Step 2: Convert to fraction form
    20,425.80/30,638.70 = 6,574.80/x
  3. Step 3: Cross multiply
    20,425.80x = 30,638.70 × 6,574.80
  4. Step 4: Simplify right side
    20,425.80x = 201,443,324.76
  5. Step 5: Solve for x
    x = 201,443,324.76/20,425.80
  6. Step 6: Final answer
    x = 9,862.20

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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.