Home / 15,919.07-21,959.16-9,940.36

Finding the Fourth Proportional to 15,919.07, 21,959.16 and 9,940.36

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Solution

The fourth proportional to 15,919.07, 21,959.16 and 9,940.36 is: 13,711.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.07 : 21,959.16 = 9,940.36 : x
  2. Step 2: Convert to fraction form
    15,919.07/21,959.16 = 9,940.36/x
  3. Step 3: Cross multiply
    15,919.07x = 21,959.16 × 9,940.36
  4. Step 4: Simplify right side
    15,919.07x = 218,281,955.70
  5. Step 5: Solve for x
    x = 218,281,955.70/15,919.07
  6. Step 6: Final answer
    x = 13,711.98

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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.