Home / 13,424.68-20,118.30-7,881.64

Finding the Fourth Proportional to 13,424.68, 20,118.30 and 7,881.64

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Solution

The fourth proportional to 13,424.68, 20,118.30 and 7,881.64 is: 11,811.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.68 : 20,118.30 = 7,881.64 : x
  2. Step 2: Convert to fraction form
    13,424.68/20,118.30 = 7,881.64/x
  3. Step 3: Cross multiply
    13,424.68x = 20,118.30 × 7,881.64
  4. Step 4: Simplify right side
    13,424.68x = 158,565,198.01
  5. Step 5: Solve for x
    x = 158,565,198.01/13,424.68
  6. Step 6: Final answer
    x = 11,811.47

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1.5x scale

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.