Home / 18,983.90-28,475.70-4,943.90

Finding the Fourth Proportional to 18,983.90, 28,475.70 and 4,943.90

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Solution

The fourth proportional to 18,983.90, 28,475.70 and 4,943.90 is: 7,415.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.90 : 28,475.70 = 4,943.90 : x
  2. Step 2: Convert to fraction form
    18,983.90/28,475.70 = 4,943.90/x
  3. Step 3: Cross multiply
    18,983.90x = 28,475.70 × 4,943.90
  4. Step 4: Simplify right side
    18,983.90x = 140,781,013.23
  5. Step 5: Solve for x
    x = 140,781,013.23/18,983.90
  6. Step 6: Final answer
    x = 7,415.81

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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.