Home / 13,135.29-19,702.93-8,721.19

Finding the Fourth Proportional to 13,135.29, 19,702.93 and 8,721.19

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Solution

The fourth proportional to 13,135.29, 19,702.93 and 8,721.19 is: 13,081.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.29 : 19,702.93 = 8,721.19 : x
  2. Step 2: Convert to fraction form
    13,135.29/19,702.93 = 8,721.19/x
  3. Step 3: Cross multiply
    13,135.29x = 19,702.93 × 8,721.19
  4. Step 4: Simplify right side
    13,135.29x = 171,832,996.09
  5. Step 5: Solve for x
    x = 171,832,996.09/13,135.29
  6. Step 6: Final answer
    x = 13,081.78

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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.