Home / 15,500.78-21,392.10-8,786.37

Finding the Fourth Proportional to 15,500.78, 21,392.10 and 8,786.37

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Solution

The fourth proportional to 15,500.78, 21,392.10 and 8,786.37 is: 12,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.78 : 21,392.10 = 8,786.37 : x
  2. Step 2: Convert to fraction form
    15,500.78/21,392.10 = 8,786.37/x
  3. Step 3: Cross multiply
    15,500.78x = 21,392.10 × 8,786.37
  4. Step 4: Simplify right side
    15,500.78x = 187,958,905.68
  5. Step 5: Solve for x
    x = 187,958,905.68/15,500.78
  6. Step 6: Final answer
    x = 12,125.77

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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.