Home / 5,420.53-8,130.39-1,957.78

Finding the Fourth Proportional to 5,420.53, 8,130.39 and 1,957.78

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Solution

The fourth proportional to 5,420.53, 8,130.39 and 1,957.78 is: 2,936.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.53 : 8,130.39 = 1,957.78 : x
  2. Step 2: Convert to fraction form
    5,420.53/8,130.39 = 1,957.78/x
  3. Step 3: Cross multiply
    5,420.53x = 8,130.39 × 1,957.78
  4. Step 4: Simplify right side
    5,420.53x = 15,917,514.93
  5. Step 5: Solve for x
    x = 15,917,514.93/5,420.53
  6. Step 6: Final answer
    x = 2,936.52

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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.