Home / 21,079.08-31,634.94-7,943.40

Finding the Fourth Proportional to 21,079.08, 31,634.94 and 7,943.40

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Solution

The fourth proportional to 21,079.08, 31,634.94 and 7,943.40 is: 11,921.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.08 : 31,634.94 = 7,943.40 : x
  2. Step 2: Convert to fraction form
    21,079.08/31,634.94 = 7,943.40/x
  3. Step 3: Cross multiply
    21,079.08x = 31,634.94 × 7,943.40
  4. Step 4: Simplify right side
    21,079.08x = 251,288,982.40
  5. Step 5: Solve for x
    x = 251,288,982.40/21,079.08
  6. Step 6: Final answer
    x = 11,921.25

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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.