Home / 21,055.54-31,594.38-8,584.78

Finding the Fourth Proportional to 21,055.54, 31,594.38 and 8,584.78

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Solution

The fourth proportional to 21,055.54, 31,594.38 and 8,584.78 is: 12,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.54 : 31,594.38 = 8,584.78 : x
  2. Step 2: Convert to fraction form
    21,055.54/31,594.38 = 8,584.78/x
  3. Step 3: Cross multiply
    21,055.54x = 31,594.38 × 8,584.78
  4. Step 4: Simplify right side
    21,055.54x = 271,230,801.54
  5. Step 5: Solve for x
    x = 271,230,801.54/21,055.54
  6. Step 6: Final answer
    x = 12,881.68

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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.