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Finding the Fourth Proportional to 23,325.80, 34,988.70 and 21,138.80

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Solution

The fourth proportional to 23,325.80, 34,988.70 and 21,138.80 is: 31,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,325.80 : 34,988.70 = 21,138.80 : x
  2. Step 2: Convert to fraction form
    23,325.80/34,988.70 = 21,138.80/x
  3. Step 3: Cross multiply
    23,325.80x = 34,988.70 × 21,138.80
  4. Step 4: Simplify right side
    23,325.80x = 739,619,131.56
  5. Step 5: Solve for x
    x = 739,619,131.56/23,325.80
  6. Step 6: Final answer
    x = 31,708.20

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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.