Home / 18,739.53-28,111.13-5,412.83

Finding the Fourth Proportional to 18,739.53, 28,111.13 and 5,412.83

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Solution

The fourth proportional to 18,739.53, 28,111.13 and 5,412.83 is: 8,119.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,739.53 : 28,111.13 = 5,412.83 : x
  2. Step 2: Convert to fraction form
    18,739.53/28,111.13 = 5,412.83/x
  3. Step 3: Cross multiply
    18,739.53x = 28,111.13 × 5,412.83
  4. Step 4: Simplify right side
    18,739.53x = 152,160,851.61
  5. Step 5: Solve for x
    x = 152,160,851.61/18,739.53
  6. Step 6: Final answer
    x = 8,119.78

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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.