Home / 21,881.28-32,829.60-13,663.68

Finding the Fourth Proportional to 21,881.28, 32,829.60 and 13,663.68

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Solution

The fourth proportional to 21,881.28, 32,829.60 and 13,663.68 is: 20,500.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.28 : 32,829.60 = 13,663.68 : x
  2. Step 2: Convert to fraction form
    21,881.28/32,829.60 = 13,663.68/x
  3. Step 3: Cross multiply
    21,881.28x = 32,829.60 × 13,663.68
  4. Step 4: Simplify right side
    21,881.28x = 448,573,148.93
  5. Step 5: Solve for x
    x = 448,573,148.93/21,881.28
  6. Step 6: Final answer
    x = 20,500.32

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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.