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Finding the Fourth Proportional to 25,510.60, 35,121.18 and 20,123.20

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Solution

The fourth proportional to 25,510.60, 35,121.18 and 20,123.20 is: 27,704.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,510.60 : 35,121.18 = 20,123.20 : x
  2. Step 2: Convert to fraction form
    25,510.60/35,121.18 = 20,123.20/x
  3. Step 3: Cross multiply
    25,510.60x = 35,121.18 × 20,123.20
  4. Step 4: Simplify right side
    25,510.60x = 706,750,529.38
  5. Step 5: Solve for x
    x = 706,750,529.38/25,510.60
  6. Step 6: Final answer
    x = 27,704.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.