Home / 10,989.32-16,468.62-5,131.40

Finding the Fourth Proportional to 10,989.32, 16,468.62 and 5,131.40

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Solution

The fourth proportional to 10,989.32, 16,468.62 and 5,131.40 is: 7,689.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.32 : 16,468.62 = 5,131.40 : x
  2. Step 2: Convert to fraction form
    10,989.32/16,468.62 = 5,131.40/x
  3. Step 3: Cross multiply
    10,989.32x = 16,468.62 × 5,131.40
  4. Step 4: Simplify right side
    10,989.32x = 84,507,076.67
  5. Step 5: Solve for x
    x = 84,507,076.67/10,989.32
  6. Step 6: Final answer
    x = 7,689.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.