Home / 15,789.68-21,788.70-8,716.13

Finding the Fourth Proportional to 15,789.68, 21,788.70 and 8,716.13

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Solution

The fourth proportional to 15,789.68, 21,788.70 and 8,716.13 is: 12,027.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.68 : 21,788.70 = 8,716.13 : x
  2. Step 2: Convert to fraction form
    15,789.68/21,788.70 = 8,716.13/x
  3. Step 3: Cross multiply
    15,789.68x = 21,788.70 × 8,716.13
  4. Step 4: Simplify right side
    15,789.68x = 189,913,141.73
  5. Step 5: Solve for x
    x = 189,913,141.73/15,789.68
  6. Step 6: Final answer
    x = 12,027.68

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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.