Home / 14,319.28-21,479.28-3,931

Finding the Fourth Proportional to 14,319.28, 21,479.28 and 3,931

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Solution

The fourth proportional to 14,319.28, 21,479.28 and 3,931 is: 5,896.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,319.28 : 21,479.28 = 3,931 : x
  2. Step 2: Convert to fraction form
    14,319.28/21,479.28 = 3,931/x
  3. Step 3: Cross multiply
    14,319.28x = 21,479.28 × 3,931
  4. Step 4: Simplify right side
    14,319.28x = 84,435,049.68
  5. Step 5: Solve for x
    x = 84,435,049.68/14,319.28
  6. Step 6: Final answer
    x = 5,896.60

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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.