Home / 40,980.15-61,479.50-12,519.68

Finding the Fourth Proportional to 40,980.15, 61,479.50 and 12,519.68

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Solution

The fourth proportional to 40,980.15, 61,479.50 and 12,519.68 is: 18,782.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,980.15 : 61,479.50 = 12,519.68 : x
  2. Step 2: Convert to fraction form
    40,980.15/61,479.50 = 12,519.68/x
  3. Step 3: Cross multiply
    40,980.15x = 61,479.50 × 12,519.68
  4. Step 4: Simplify right side
    40,980.15x = 769,703,296.56
  5. Step 5: Solve for x
    x = 769,703,296.56/40,980.15
  6. Step 6: Final answer
    x = 18,782.34

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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.