Home / 21,157.11-31,754.70-11,304.81

Finding the Fourth Proportional to 21,157.11, 31,754.70 and 11,304.81

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Solution

The fourth proportional to 21,157.11, 31,754.70 and 11,304.81 is: 16,967.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.11 : 31,754.70 = 11,304.81 : x
  2. Step 2: Convert to fraction form
    21,157.11/31,754.70 = 11,304.81/x
  3. Step 3: Cross multiply
    21,157.11x = 31,754.70 × 11,304.81
  4. Step 4: Simplify right side
    21,157.11x = 358,980,850.11
  5. Step 5: Solve for x
    x = 358,980,850.11/21,157.11
  6. Step 6: Final answer
    x = 16,967.39

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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.