Home / 15,919.12-21,959.32-9,943.48

Finding the Fourth Proportional to 15,919.12, 21,959.32 and 9,943.48

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Solution

The fourth proportional to 15,919.12, 21,959.32 and 9,943.48 is: 13,716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.12 : 21,959.32 = 9,943.48 : x
  2. Step 2: Convert to fraction form
    15,919.12/21,959.32 = 9,943.48/x
  3. Step 3: Cross multiply
    15,919.12x = 21,959.32 × 9,943.48
  4. Step 4: Simplify right side
    15,919.12x = 218,352,059.23
  5. Step 5: Solve for x
    x = 218,352,059.23/15,919.12
  6. Step 6: Final answer
    x = 13,716.34

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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.