Home / 12,986.28-17,914.32-7,671.87

Finding the Fourth Proportional to 12,986.28, 17,914.32 and 7,671.87

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Solution

The fourth proportional to 12,986.28, 17,914.32 and 7,671.87 is: 10,583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.28 : 17,914.32 = 7,671.87 : x
  2. Step 2: Convert to fraction form
    12,986.28/17,914.32 = 7,671.87/x
  3. Step 3: Cross multiply
    12,986.28x = 17,914.32 × 7,671.87
  4. Step 4: Simplify right side
    12,986.28x = 137,436,334.18
  5. Step 5: Solve for x
    x = 137,436,334.18/12,986.28
  6. Step 6: Final answer
    x = 10,583.20

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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.