Home / 53,929.20-80,855.40-20,636.40

Finding the Fourth Proportional to 53,929.20, 80,855.40 and 20,636.40

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Solution

The fourth proportional to 53,929.20, 80,855.40 and 20,636.40 is: 30,939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,929.20 : 80,855.40 = 20,636.40 : x
  2. Step 2: Convert to fraction form
    53,929.20/80,855.40 = 20,636.40/x
  3. Step 3: Cross multiply
    53,929.20x = 80,855.40 × 20,636.40
  4. Step 4: Simplify right side
    53,929.20x = 1,668,564,376.56
  5. Step 5: Solve for x
    x = 1,668,564,376.56/53,929.20
  6. Step 6: Final answer
    x = 30,939.91

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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.