Home / 15,893.91-21,931.70-8,819.37

Finding the Fourth Proportional to 15,893.91, 21,931.70 and 8,819.37

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Solution

The fourth proportional to 15,893.91, 21,931.70 and 8,819.37 is: 12,169.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,893.91 : 21,931.70 = 8,819.37 : x
  2. Step 2: Convert to fraction form
    15,893.91/21,931.70 = 8,819.37/x
  3. Step 3: Cross multiply
    15,893.91x = 21,931.70 × 8,819.37
  4. Step 4: Simplify right side
    15,893.91x = 193,423,732.93
  5. Step 5: Solve for x
    x = 193,423,732.93/15,893.91
  6. Step 6: Final answer
    x = 12,169.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.