Home / 12,400.44-17,115.78-7,688.76

Finding the Fourth Proportional to 12,400.44, 17,115.78 and 7,688.76

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Solution

The fourth proportional to 12,400.44, 17,115.78 and 7,688.76 is: 10,612.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,400.44 : 17,115.78 = 7,688.76 : x
  2. Step 2: Convert to fraction form
    12,400.44/17,115.78 = 7,688.76/x
  3. Step 3: Cross multiply
    12,400.44x = 17,115.78 × 7,688.76
  4. Step 4: Simplify right side
    12,400.44x = 131,599,124.63
  5. Step 5: Solve for x
    x = 131,599,124.63/12,400.44
  6. Step 6: Final answer
    x = 10,612.46

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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.