Home / 21,218.45-31,836.89-8,074.58

Finding the Fourth Proportional to 21,218.45, 31,836.89 and 8,074.58

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Solution

The fourth proportional to 21,218.45, 31,836.89 and 8,074.58 is: 12,115.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.45 : 31,836.89 = 8,074.58 : x
  2. Step 2: Convert to fraction form
    21,218.45/31,836.89 = 8,074.58/x
  3. Step 3: Cross multiply
    21,218.45x = 31,836.89 × 8,074.58
  4. Step 4: Simplify right side
    21,218.45x = 257,069,376.26
  5. Step 5: Solve for x
    x = 257,069,376.26/21,218.45
  6. Step 6: Final answer
    x = 12,115.37

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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.