Home / 20,805.47-31,207.28-5,812.68

Finding the Fourth Proportional to 20,805.47, 31,207.28 and 5,812.68

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Solution

The fourth proportional to 20,805.47, 31,207.28 and 5,812.68 is: 8,718.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.47 : 31,207.28 = 5,812.68 : x
  2. Step 2: Convert to fraction form
    20,805.47/31,207.28 = 5,812.68/x
  3. Step 3: Cross multiply
    20,805.47x = 31,207.28 × 5,812.68
  4. Step 4: Simplify right side
    20,805.47x = 181,397,903.25
  5. Step 5: Solve for x
    x = 181,397,903.25/20,805.47
  6. Step 6: Final answer
    x = 8,718.76

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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.