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Finding the Fourth Proportional to 15,781.93, 21,807.93 and 15,013.14

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Solution

The fourth proportional to 15,781.93, 21,807.93 and 15,013.14 is: 20,745.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,781.93 : 21,807.93 = 15,013.14 : x
  2. Step 2: Convert to fraction form
    15,781.93/21,807.93 = 15,013.14/x
  3. Step 3: Cross multiply
    15,781.93x = 21,807.93 × 15,013.14
  4. Step 4: Simplify right side
    15,781.93x = 327,405,506.20
  5. Step 5: Solve for x
    x = 327,405,506.20/15,781.93
  6. Step 6: Final answer
    x = 20,745.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.