Home / 12,910.80-19,366.20-5,118.60

Finding the Fourth Proportional to 12,910.80, 19,366.20 and 5,118.60

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Solution

The fourth proportional to 12,910.80, 19,366.20 and 5,118.60 is: 7,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.80 : 19,366.20 = 5,118.60 : x
  2. Step 2: Convert to fraction form
    12,910.80/19,366.20 = 5,118.60/x
  3. Step 3: Cross multiply
    12,910.80x = 19,366.20 × 5,118.60
  4. Step 4: Simplify right side
    12,910.80x = 99,127,831.32
  5. Step 5: Solve for x
    x = 99,127,831.32/12,910.80
  6. Step 6: Final answer
    x = 7,677.90

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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.