Home / 5,151.80-7,727.70-1,256.21

Finding the Fourth Proportional to 5,151.80, 7,727.70 and 1,256.21

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Solution

The fourth proportional to 5,151.80, 7,727.70 and 1,256.21 is: 1,884.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.80 : 7,727.70 = 1,256.21 : x
  2. Step 2: Convert to fraction form
    5,151.80/7,727.70 = 1,256.21/x
  3. Step 3: Cross multiply
    5,151.80x = 7,727.70 × 1,256.21
  4. Step 4: Simplify right side
    5,151.80x = 9,707,614.02
  5. Step 5: Solve for x
    x = 9,707,614.02/5,151.80
  6. Step 6: Final answer
    x = 1,884.32

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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.