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Finding the Fourth Proportional to 18,283.70, 27,425.55 and 5,138.30

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Solution

The fourth proportional to 18,283.70, 27,425.55 and 5,138.30 is: 7,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,283.70 : 27,425.55 = 5,138.30 : x
  2. Step 2: Convert to fraction form
    18,283.70/27,425.55 = 5,138.30/x
  3. Step 3: Cross multiply
    18,283.70x = 27,425.55 × 5,138.30
  4. Step 4: Simplify right side
    18,283.70x = 140,920,703.57
  5. Step 5: Solve for x
    x = 140,920,703.57/18,283.70
  6. Step 6: Final answer
    x = 7,707.45

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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.