Home / 21,818.68-30,113.67-12,865.66

Finding the Fourth Proportional to 21,818.68, 30,113.67 and 12,865.66

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Solution

The fourth proportional to 21,818.68, 30,113.67 and 12,865.66 is: 17,756.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.68 : 30,113.67 = 12,865.66 : x
  2. Step 2: Convert to fraction form
    21,818.68/30,113.67 = 12,865.66/x
  3. Step 3: Cross multiply
    21,818.68x = 30,113.67 × 12,865.66
  4. Step 4: Simplify right side
    21,818.68x = 387,432,239.57
  5. Step 5: Solve for x
    x = 387,432,239.57/21,818.68
  6. Step 6: Final answer
    x = 17,756.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.