Home / 12,871.14-19,320.35-11,399.91

Finding the Fourth Proportional to 12,871.14, 19,320.35 and 11,399.91

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Solution

The fourth proportional to 12,871.14, 19,320.35 and 11,399.91 is: 17,111.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,871.14 : 19,320.35 = 11,399.91 : x
  2. Step 2: Convert to fraction form
    12,871.14/19,320.35 = 11,399.91/x
  3. Step 3: Cross multiply
    12,871.14x = 19,320.35 × 11,399.91
  4. Step 4: Simplify right side
    12,871.14x = 220,250,240.18
  5. Step 5: Solve for x
    x = 220,250,240.18/12,871.14
  6. Step 6: Final answer
    x = 17,111.95

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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.