Home / 21,053.54-31,591.38-8,582.78

Finding the Fourth Proportional to 21,053.54, 31,591.38 and 8,582.78

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Solution

The fourth proportional to 21,053.54, 31,591.38 and 8,582.78 is: 12,878.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.54 : 31,591.38 = 8,582.78 : x
  2. Step 2: Convert to fraction form
    21,053.54/31,591.38 = 8,582.78/x
  3. Step 3: Cross multiply
    21,053.54x = 31,591.38 × 8,582.78
  4. Step 4: Simplify right side
    21,053.54x = 271,141,864.44
  5. Step 5: Solve for x
    x = 271,141,864.44/21,053.54
  6. Step 6: Final answer
    x = 12,878.68

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1.5x scale

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.