Home / 21,458.78-32,177.19-8,975.39

Finding the Fourth Proportional to 21,458.78, 32,177.19 and 8,975.39

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Solution

The fourth proportional to 21,458.78, 32,177.19 and 8,975.39 is: 13,458.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,458.78 : 32,177.19 = 8,975.39 : x
  2. Step 2: Convert to fraction form
    21,458.78/32,177.19 = 8,975.39/x
  3. Step 3: Cross multiply
    21,458.78x = 32,177.19 × 8,975.39
  4. Step 4: Simplify right side
    21,458.78x = 288,802,829.35
  5. Step 5: Solve for x
    x = 288,802,829.35/21,458.78
  6. Step 6: Final answer
    x = 13,458.49

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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.