Home / 20,839.95-31,274.51-9,161.37

Finding the Fourth Proportional to 20,839.95, 31,274.51 and 9,161.37

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Solution

The fourth proportional to 20,839.95, 31,274.51 and 9,161.37 is: 13,748.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.95 : 31,274.51 = 9,161.37 : x
  2. Step 2: Convert to fraction form
    20,839.95/31,274.51 = 9,161.37/x
  3. Step 3: Cross multiply
    20,839.95x = 31,274.51 × 9,161.37
  4. Step 4: Simplify right side
    20,839.95x = 286,517,311.87
  5. Step 5: Solve for x
    x = 286,517,311.87/20,839.95
  6. Step 6: Final answer
    x = 13,748.46

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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.