Home / 53,780.15-80,668.40-20,499

Finding the Fourth Proportional to 53,780.15, 80,668.40 and 20,499

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Solution

The fourth proportional to 53,780.15, 80,668.40 and 20,499 is: 30,747.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,780.15 : 80,668.40 = 20,499 : x
  2. Step 2: Convert to fraction form
    53,780.15/80,668.40 = 20,499/x
  3. Step 3: Cross multiply
    53,780.15x = 80,668.40 × 20,499
  4. Step 4: Simplify right side
    53,780.15x = 1,653,621,429.11
  5. Step 5: Solve for x
    x = 1,653,621,429.11/53,780.15
  6. Step 6: Final answer
    x = 30,747.81

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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.