Home / 21,077.11-31,606.40-11,214.05

Finding the Fourth Proportional to 21,077.11, 31,606.40 and 11,214.05

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Solution

The fourth proportional to 21,077.11, 31,606.40 and 11,214.05 is: 16,816.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,077.11 : 31,606.40 = 11,214.05 : x
  2. Step 2: Convert to fraction form
    21,077.11/31,606.40 = 11,214.05/x
  3. Step 3: Cross multiply
    21,077.11x = 31,606.40 × 11,214.05
  4. Step 4: Simplify right side
    21,077.11x = 354,435,619.92
  5. Step 5: Solve for x
    x = 354,435,619.92/21,077.11
  6. Step 6: Final answer
    x = 16,816.14

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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.