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Finding the Fourth Proportional to 30,540, 42,137.04 and 18,437.52

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Solution

The fourth proportional to 30,540, 42,137.04 and 18,437.52 is: 25,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,540 : 42,137.04 = 18,437.52 : x
  2. Step 2: Convert to fraction form
    30,540/42,137.04 = 18,437.52/x
  3. Step 3: Cross multiply
    30,540x = 42,137.04 × 18,437.52
  4. Step 4: Simplify right side
    30,540x = 776,902,517.74
  5. Step 5: Solve for x
    x = 776,902,517.74/30,540
  6. Step 6: Final answer
    x = 25,438.85

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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.