Home / 5,151.31-7,728.41-1,690.99

Finding the Fourth Proportional to 5,151.31, 7,728.41 and 1,690.99

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Solution

The fourth proportional to 5,151.31, 7,728.41 and 1,690.99 is: 2,536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.31 : 7,728.41 = 1,690.99 : x
  2. Step 2: Convert to fraction form
    5,151.31/7,728.41 = 1,690.99/x
  3. Step 3: Cross multiply
    5,151.31x = 7,728.41 × 1,690.99
  4. Step 4: Simplify right side
    5,151.31x = 13,068,655.57
  5. Step 5: Solve for x
    x = 13,068,655.57/5,151.31
  6. Step 6: Final answer
    x = 2,536.96

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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.