Home / 17,821.40-26,741.30-12,931.36

Finding the Fourth Proportional to 17,821.40, 26,741.30 and 12,931.36

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Solution

The fourth proportional to 17,821.40, 26,741.30 and 12,931.36 is: 19,403.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,821.40 : 26,741.30 = 12,931.36 : x
  2. Step 2: Convert to fraction form
    17,821.40/26,741.30 = 12,931.36/x
  3. Step 3: Cross multiply
    17,821.40x = 26,741.30 × 12,931.36
  4. Step 4: Simplify right side
    17,821.40x = 345,801,377.17
  5. Step 5: Solve for x
    x = 345,801,377.17/17,821.40
  6. Step 6: Final answer
    x = 19,403.72

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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.