Home / 12,531.99-18,800.10-4,212.81

Finding the Fourth Proportional to 12,531.99, 18,800.10 and 4,212.81

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Solution

The fourth proportional to 12,531.99, 18,800.10 and 4,212.81 is: 6,319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,531.99 : 18,800.10 = 4,212.81 : x
  2. Step 2: Convert to fraction form
    12,531.99/18,800.10 = 4,212.81/x
  3. Step 3: Cross multiply
    12,531.99x = 18,800.10 × 4,212.81
  4. Step 4: Simplify right side
    12,531.99x = 79,201,249.28
  5. Step 5: Solve for x
    x = 79,201,249.28/12,531.99
  6. Step 6: Final answer
    x = 6,319.93

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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.