Home / 20,946.65-31,419.70-5,151.81

Finding the Fourth Proportional to 20,946.65, 31,419.70 and 5,151.81

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Solution

The fourth proportional to 20,946.65, 31,419.70 and 5,151.81 is: 7,727.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.65 : 31,419.70 = 5,151.81 : x
  2. Step 2: Convert to fraction form
    20,946.65/31,419.70 = 5,151.81/x
  3. Step 3: Cross multiply
    20,946.65x = 31,419.70 × 5,151.81
  4. Step 4: Simplify right side
    20,946.65x = 161,868,311.78
  5. Step 5: Solve for x
    x = 161,868,311.78/20,946.65
  6. Step 6: Final answer
    x = 7,727.65

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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.