Home / 15,786.39-21,784.23-8,712.81

Finding the Fourth Proportional to 15,786.39, 21,784.23 and 8,712.81

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Solution

The fourth proportional to 15,786.39, 21,784.23 and 8,712.81 is: 12,023.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.39 : 21,784.23 = 8,712.81 : x
  2. Step 2: Convert to fraction form
    15,786.39/21,784.23 = 8,712.81/x
  3. Step 3: Cross multiply
    15,786.39x = 21,784.23 × 8,712.81
  4. Step 4: Simplify right side
    15,786.39x = 189,801,856.99
  5. Step 5: Solve for x
    x = 189,801,856.99/15,786.39
  6. Step 6: Final answer
    x = 12,023.13

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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.