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Finding the Fourth Proportional to 21,881.61, 32,614.56 and 20,636.19

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Solution

The fourth proportional to 21,881.61, 32,614.56 and 20,636.19 is: 30,758.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.61 : 32,614.56 = 20,636.19 : x
  2. Step 2: Convert to fraction form
    21,881.61/32,614.56 = 20,636.19/x
  3. Step 3: Cross multiply
    21,881.61x = 32,614.56 × 20,636.19
  4. Step 4: Simplify right side
    21,881.61x = 673,040,256.93
  5. Step 5: Solve for x
    x = 673,040,256.93/21,881.61
  6. Step 6: Final answer
    x = 30,758.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.