Home / 21,278.31-31,899.59-9,261.48

Finding the Fourth Proportional to 21,278.31, 31,899.59 and 9,261.48

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Solution

The fourth proportional to 21,278.31, 31,899.59 and 9,261.48 is: 13,884.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.31 : 31,899.59 = 9,261.48 : x
  2. Step 2: Convert to fraction form
    21,278.31/31,899.59 = 9,261.48/x
  3. Step 3: Cross multiply
    21,278.31x = 31,899.59 × 9,261.48
  4. Step 4: Simplify right side
    21,278.31x = 295,437,517.70
  5. Step 5: Solve for x
    x = 295,437,517.70/21,278.31
  6. Step 6: Final answer
    x = 13,884.45

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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.