Home / 18,705.48-28,078.44-16,638.72

Finding the Fourth Proportional to 18,705.48, 28,078.44 and 16,638.72

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Solution

The fourth proportional to 18,705.48, 28,078.44 and 16,638.72 is: 24,976.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.48 : 28,078.44 = 16,638.72 : x
  2. Step 2: Convert to fraction form
    18,705.48/28,078.44 = 16,638.72/x
  3. Step 3: Cross multiply
    18,705.48x = 28,078.44 × 16,638.72
  4. Step 4: Simplify right side
    18,705.48x = 467,189,301.20
  5. Step 5: Solve for x
    x = 467,189,301.20/18,705.48
  6. Step 6: Final answer
    x = 24,976.07

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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.