Home / 13,291.28-19,936.91-3,931.42

Finding the Fourth Proportional to 13,291.28, 19,936.91 and 3,931.42

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Solution

The fourth proportional to 13,291.28, 19,936.91 and 3,931.42 is: 5,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.28 : 19,936.91 = 3,931.42 : x
  2. Step 2: Convert to fraction form
    13,291.28/19,936.91 = 3,931.42/x
  3. Step 3: Cross multiply
    13,291.28x = 19,936.91 × 3,931.42
  4. Step 4: Simplify right side
    13,291.28x = 78,380,366.71
  5. Step 5: Solve for x
    x = 78,380,366.71/13,291.28
  6. Step 6: Final answer
    x = 5,897.13

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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.