Home / 21,253.49-31,880.25-7,926.28

Finding the Fourth Proportional to 21,253.49, 31,880.25 and 7,926.28

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Solution

The fourth proportional to 21,253.49, 31,880.25 and 7,926.28 is: 11,889.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.49 : 31,880.25 = 7,926.28 : x
  2. Step 2: Convert to fraction form
    21,253.49/31,880.25 = 7,926.28/x
  3. Step 3: Cross multiply
    21,253.49x = 31,880.25 × 7,926.28
  4. Step 4: Simplify right side
    21,253.49x = 252,691,728.09
  5. Step 5: Solve for x
    x = 252,691,728.09/21,253.49
  6. Step 6: Final answer
    x = 11,889.43

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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.