Home / 21,316.32-31,974.75-8,169.48

Finding the Fourth Proportional to 21,316.32, 31,974.75 and 8,169.48

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Solution

The fourth proportional to 21,316.32, 31,974.75 and 8,169.48 is: 12,254.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.32 : 31,974.75 = 8,169.48 : x
  2. Step 2: Convert to fraction form
    21,316.32/31,974.75 = 8,169.48/x
  3. Step 3: Cross multiply
    21,316.32x = 31,974.75 × 8,169.48
  4. Step 4: Simplify right side
    21,316.32x = 261,217,080.63
  5. Step 5: Solve for x
    x = 261,217,080.63/21,316.32
  6. Step 6: Final answer
    x = 12,254.32

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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.