Home / 13,440.40-20,149.86-5,118.76

Finding the Fourth Proportional to 13,440.40, 20,149.86 and 5,118.76

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Solution

The fourth proportional to 13,440.40, 20,149.86 and 5,118.76 is: 7,674.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.40 : 20,149.86 = 5,118.76 : x
  2. Step 2: Convert to fraction form
    13,440.40/20,149.86 = 5,118.76/x
  3. Step 3: Cross multiply
    13,440.40x = 20,149.86 × 5,118.76
  4. Step 4: Simplify right side
    13,440.40x = 103,142,297.37
  5. Step 5: Solve for x
    x = 103,142,297.37/13,440.40
  6. Step 6: Final answer
    x = 7,674.05

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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.