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Finding the Fourth Proportional to 25,938.80, 38,908.20 and 20,106.80

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Solution

The fourth proportional to 25,938.80, 38,908.20 and 20,106.80 is: 30,160.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,938.80 : 38,908.20 = 20,106.80 : x
  2. Step 2: Convert to fraction form
    25,938.80/38,908.20 = 20,106.80/x
  3. Step 3: Cross multiply
    25,938.80x = 38,908.20 × 20,106.80
  4. Step 4: Simplify right side
    25,938.80x = 782,319,395.76
  5. Step 5: Solve for x
    x = 782,319,395.76/25,938.80
  6. Step 6: Final answer
    x = 30,160.20

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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.