Home / 53,687.07-80,508.13-20,388.78

Finding the Fourth Proportional to 53,687.07, 80,508.13 and 20,388.78

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Solution

The fourth proportional to 53,687.07, 80,508.13 and 20,388.78 is: 30,574.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,687.07 : 80,508.13 = 20,388.78 : x
  2. Step 2: Convert to fraction form
    53,687.07/80,508.13 = 20,388.78/x
  3. Step 3: Cross multiply
    53,687.07x = 80,508.13 × 20,388.78
  4. Step 4: Simplify right side
    53,687.07x = 1,641,462,499.81
  5. Step 5: Solve for x
    x = 1,641,462,499.81/53,687.07
  6. Step 6: Final answer
    x = 30,574.63

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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.