Home / 15,789.75-21,789.57-8,716.02

Finding the Fourth Proportional to 15,789.75, 21,789.57 and 8,716.02

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Solution

The fourth proportional to 15,789.75, 21,789.57 and 8,716.02 is: 12,027.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.75 : 21,789.57 = 8,716.02 : x
  2. Step 2: Convert to fraction form
    15,789.75/21,789.57 = 8,716.02/x
  3. Step 3: Cross multiply
    15,789.75x = 21,789.57 × 8,716.02
  4. Step 4: Simplify right side
    15,789.75x = 189,918,327.91
  5. Step 5: Solve for x
    x = 189,918,327.91/15,789.75
  6. Step 6: Final answer
    x = 12,027.95

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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.