Home / 21,119.90-31,669.61-8,634.96

Finding the Fourth Proportional to 21,119.90, 31,669.61 and 8,634.96

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Solution

The fourth proportional to 21,119.90, 31,669.61 and 8,634.96 is: 12,948.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.90 : 31,669.61 = 8,634.96 : x
  2. Step 2: Convert to fraction form
    21,119.90/31,669.61 = 8,634.96/x
  3. Step 3: Cross multiply
    21,119.90x = 31,669.61 × 8,634.96
  4. Step 4: Simplify right side
    21,119.90x = 273,465,772.39
  5. Step 5: Solve for x
    x = 273,465,772.39/21,119.90
  6. Step 6: Final answer
    x = 12,948.25

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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.