Home / 13,781.08-20,659.09-5,009.79

Finding the Fourth Proportional to 13,781.08, 20,659.09 and 5,009.79

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Solution

The fourth proportional to 13,781.08, 20,659.09 and 5,009.79 is: 7,510.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.08 : 20,659.09 = 5,009.79 : x
  2. Step 2: Convert to fraction form
    13,781.08/20,659.09 = 5,009.79/x
  3. Step 3: Cross multiply
    13,781.08x = 20,659.09 × 5,009.79
  4. Step 4: Simplify right side
    13,781.08x = 103,497,702.49
  5. Step 5: Solve for x
    x = 103,497,702.49/13,781.08
  6. Step 6: Final answer
    x = 7,510.13

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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.