Home / 15,786.95-21,785.34-8,713.28

Finding the Fourth Proportional to 15,786.95, 21,785.34 and 8,713.28

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Solution

The fourth proportional to 15,786.95, 21,785.34 and 8,713.28 is: 12,023.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.95 : 21,785.34 = 8,713.28 : x
  2. Step 2: Convert to fraction form
    15,786.95/21,785.34 = 8,713.28/x
  3. Step 3: Cross multiply
    15,786.95x = 21,785.34 × 8,713.28
  4. Step 4: Simplify right side
    15,786.95x = 189,821,658.39
  5. Step 5: Solve for x
    x = 189,821,658.39/15,786.95
  6. Step 6: Final answer
    x = 12,023.96

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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.