Home / 18,981.90-28,472.70-4,941.90

Finding the Fourth Proportional to 18,981.90, 28,472.70 and 4,941.90

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Solution

The fourth proportional to 18,981.90, 28,472.70 and 4,941.90 is: 7,412.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.90 : 28,472.70 = 4,941.90 : x
  2. Step 2: Convert to fraction form
    18,981.90/28,472.70 = 4,941.90/x
  3. Step 3: Cross multiply
    18,981.90x = 28,472.70 × 4,941.90
  4. Step 4: Simplify right side
    18,981.90x = 140,709,236.13
  5. Step 5: Solve for x
    x = 140,709,236.13/18,981.90
  6. Step 6: Final answer
    x = 7,412.81

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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.