Home / 11,387.32-17,077.64-3,990.40

Finding the Fourth Proportional to 11,387.32, 17,077.64 and 3,990.40

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Solution

The fourth proportional to 11,387.32, 17,077.64 and 3,990.40 is: 5,984.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,387.32 : 17,077.64 = 3,990.40 : x
  2. Step 2: Convert to fraction form
    11,387.32/17,077.64 = 3,990.40/x
  3. Step 3: Cross multiply
    11,387.32x = 17,077.64 × 3,990.40
  4. Step 4: Simplify right side
    11,387.32x = 68,146,552.01
  5. Step 5: Solve for x
    x = 68,146,552.01/11,387.32
  6. Step 6: Final answer
    x = 5,984.43

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1.5x scale

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.