Home / 20,782.39-31,169.13-5,988.55

Finding the Fourth Proportional to 20,782.39, 31,169.13 and 5,988.55

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Solution

The fourth proportional to 20,782.39, 31,169.13 and 5,988.55 is: 8,981.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.39 : 31,169.13 = 5,988.55 : x
  2. Step 2: Convert to fraction form
    20,782.39/31,169.13 = 5,988.55/x
  3. Step 3: Cross multiply
    20,782.39x = 31,169.13 × 5,988.55
  4. Step 4: Simplify right side
    20,782.39x = 186,657,893.46
  5. Step 5: Solve for x
    x = 186,657,893.46/20,782.39
  6. Step 6: Final answer
    x = 8,981.54

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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.