Home / 21,330.89-31,982.62-8,859.51

Finding the Fourth Proportional to 21,330.89, 31,982.62 and 8,859.51

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Solution

The fourth proportional to 21,330.89, 31,982.62 and 8,859.51 is: 13,283.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.89 : 31,982.62 = 8,859.51 : x
  2. Step 2: Convert to fraction form
    21,330.89/31,982.62 = 8,859.51/x
  3. Step 3: Cross multiply
    21,330.89x = 31,982.62 × 8,859.51
  4. Step 4: Simplify right side
    21,330.89x = 283,350,341.72
  5. Step 5: Solve for x
    x = 283,350,341.72/21,330.89
  6. Step 6: Final answer
    x = 13,283.57

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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.