Home / 15,907.36-21,959.60-9,947.78

Finding the Fourth Proportional to 15,907.36, 21,959.60 and 9,947.78

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Solution

The fourth proportional to 15,907.36, 21,959.60 and 9,947.78 is: 13,732.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,907.36 : 21,959.60 = 9,947.78 : x
  2. Step 2: Convert to fraction form
    15,907.36/21,959.60 = 9,947.78/x
  3. Step 3: Cross multiply
    15,907.36x = 21,959.60 × 9,947.78
  4. Step 4: Simplify right side
    15,907.36x = 218,449,269.69
  5. Step 5: Solve for x
    x = 218,449,269.69/15,907.36
  6. Step 6: Final answer
    x = 13,732.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.