Home / 36,518.40-54,734.40-18,979.20

Finding the Fourth Proportional to 36,518.40, 54,734.40 and 18,979.20

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Solution

The fourth proportional to 36,518.40, 54,734.40 and 18,979.20 is: 28,446.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,518.40 : 54,734.40 = 18,979.20 : x
  2. Step 2: Convert to fraction form
    36,518.40/54,734.40 = 18,979.20/x
  3. Step 3: Cross multiply
    36,518.40x = 54,734.40 × 18,979.20
  4. Step 4: Simplify right side
    36,518.40x = 1,038,815,124.48
  5. Step 5: Solve for x
    x = 1,038,815,124.48/36,518.40
  6. Step 6: Final answer
    x = 28,446.35

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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.