Home / 30,591.19-45,855.76-20,731.45

Finding the Fourth Proportional to 30,591.19, 45,855.76 and 20,731.45

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Solution

The fourth proportional to 30,591.19, 45,855.76 and 20,731.45 is: 31,076.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,591.19 : 45,855.76 = 20,731.45 : x
  2. Step 2: Convert to fraction form
    30,591.19/45,855.76 = 20,731.45/x
  3. Step 3: Cross multiply
    30,591.19x = 45,855.76 × 20,731.45
  4. Step 4: Simplify right side
    30,591.19x = 950,656,395.65
  5. Step 5: Solve for x
    x = 950,656,395.65/30,591.19
  6. Step 6: Final answer
    x = 31,076.15

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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.