Home / 14,187.29-21,285.79-5,424.71

Finding the Fourth Proportional to 14,187.29, 21,285.79 and 5,424.71

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Solution

The fourth proportional to 14,187.29, 21,285.79 and 5,424.71 is: 8,138.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,187.29 : 21,285.79 = 5,424.71 : x
  2. Step 2: Convert to fraction form
    14,187.29/21,285.79 = 5,424.71/x
  3. Step 3: Cross multiply
    14,187.29x = 21,285.79 × 5,424.71
  4. Step 4: Simplify right side
    14,187.29x = 115,469,117.88
  5. Step 5: Solve for x
    x = 115,469,117.88/14,187.29
  6. Step 6: Final answer
    x = 8,138.92

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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.