Home / 12,911.28-19,366.96-9,215.28

Finding the Fourth Proportional to 12,911.28, 19,366.96 and 9,215.28

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Solution

The fourth proportional to 12,911.28, 19,366.96 and 9,215.28 is: 13,822.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.28 : 19,366.96 = 9,215.28 : x
  2. Step 2: Convert to fraction form
    12,911.28/19,366.96 = 9,215.28/x
  3. Step 3: Cross multiply
    12,911.28x = 19,366.96 × 9,215.28
  4. Step 4: Simplify right side
    12,911.28x = 178,471,959.15
  5. Step 5: Solve for x
    x = 178,471,959.15/12,911.28
  6. Step 6: Final answer
    x = 13,822.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.