Home / 13,928.88-19,221.12-7,959.76

Finding the Fourth Proportional to 13,928.88, 19,221.12 and 7,959.76

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Solution

The fourth proportional to 13,928.88, 19,221.12 and 7,959.76 is: 10,984.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.88 : 19,221.12 = 7,959.76 : x
  2. Step 2: Convert to fraction form
    13,928.88/19,221.12 = 7,959.76/x
  3. Step 3: Cross multiply
    13,928.88x = 19,221.12 × 7,959.76
  4. Step 4: Simplify right side
    13,928.88x = 152,995,502.13
  5. Step 5: Solve for x
    x = 152,995,502.13/13,928.88
  6. Step 6: Final answer
    x = 10,984.05

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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.