Home / 5,905.16-8,151.70-3,991.40

Finding the Fourth Proportional to 5,905.16, 8,151.70 and 3,991.40

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Solution

The fourth proportional to 5,905.16, 8,151.70 and 3,991.40 is: 5,509.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,905.16 : 8,151.70 = 3,991.40 : x
  2. Step 2: Convert to fraction form
    5,905.16/8,151.70 = 3,991.40/x
  3. Step 3: Cross multiply
    5,905.16x = 8,151.70 × 3,991.40
  4. Step 4: Simplify right side
    5,905.16x = 32,536,695.38
  5. Step 5: Solve for x
    x = 32,536,695.38/5,905.16
  6. Step 6: Final answer
    x = 5,509.88

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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.