Home / 13,959.76-19,264.96-7,991.28

Finding the Fourth Proportional to 13,959.76, 19,264.96 and 7,991.28

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Solution

The fourth proportional to 13,959.76, 19,264.96 and 7,991.28 is: 11,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.76 : 19,264.96 = 7,991.28 : x
  2. Step 2: Convert to fraction form
    13,959.76/19,264.96 = 7,991.28/x
  3. Step 3: Cross multiply
    13,959.76x = 19,264.96 × 7,991.28
  4. Step 4: Simplify right side
    13,959.76x = 153,951,689.55
  5. Step 5: Solve for x
    x = 153,951,689.55/13,959.76
  6. Step 6: Final answer
    x = 11,028.25

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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.