Home / 12,539.79-18,816.97-5,149.55

Finding the Fourth Proportional to 12,539.79, 18,816.97 and 5,149.55

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Solution

The fourth proportional to 12,539.79, 18,816.97 and 5,149.55 is: 7,727.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.79 : 18,816.97 = 5,149.55 : x
  2. Step 2: Convert to fraction form
    12,539.79/18,816.97 = 5,149.55/x
  3. Step 3: Cross multiply
    12,539.79x = 18,816.97 × 5,149.55
  4. Step 4: Simplify right side
    12,539.79x = 96,898,927.86
  5. Step 5: Solve for x
    x = 96,898,927.86/12,539.79
  6. Step 6: Final answer
    x = 7,727.32

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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.