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Finding the Fourth Proportional to 37,139.80, 55,716.90 and 18,671.80

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Solution

The fourth proportional to 37,139.80, 55,716.90 and 18,671.80 is: 28,011.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,139.80 : 55,716.90 = 18,671.80 : x
  2. Step 2: Convert to fraction form
    37,139.80/55,716.90 = 18,671.80/x
  3. Step 3: Cross multiply
    37,139.80x = 55,716.90 × 18,671.80
  4. Step 4: Simplify right side
    37,139.80x = 1,040,334,813.42
  5. Step 5: Solve for x
    x = 1,040,334,813.42/37,139.80
  6. Step 6: Final answer
    x = 28,011.32

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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.