Home / 20,487.56-30,739.98-18,853

Finding the Fourth Proportional to 20,487.56, 30,739.98 and 18,853

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Solution

The fourth proportional to 20,487.56, 30,739.98 and 18,853 is: 28,287.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.56 : 30,739.98 = 18,853 : x
  2. Step 2: Convert to fraction form
    20,487.56/30,739.98 = 18,853/x
  3. Step 3: Cross multiply
    20,487.56x = 30,739.98 × 18,853
  4. Step 4: Simplify right side
    20,487.56x = 579,540,842.94
  5. Step 5: Solve for x
    x = 579,540,842.94/20,487.56
  6. Step 6: Final answer
    x = 28,287.45

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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.