Home / 21,087.24-31,627.20-7,939.74

Finding the Fourth Proportional to 21,087.24, 31,627.20 and 7,939.74

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Solution

The fourth proportional to 21,087.24, 31,627.20 and 7,939.74 is: 11,908.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.24 : 31,627.20 = 7,939.74 : x
  2. Step 2: Convert to fraction form
    21,087.24/31,627.20 = 7,939.74/x
  3. Step 3: Cross multiply
    21,087.24x = 31,627.20 × 7,939.74
  4. Step 4: Simplify right side
    21,087.24x = 251,111,744.93
  5. Step 5: Solve for x
    x = 251,111,744.93/21,087.24
  6. Step 6: Final answer
    x = 11,908.23

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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.