Home / 13,479.20-20,218.80-7,647.20

Finding the Fourth Proportional to 13,479.20, 20,218.80 and 7,647.20

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Solution

The fourth proportional to 13,479.20, 20,218.80 and 7,647.20 is: 11,470.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.20 : 20,218.80 = 7,647.20 : x
  2. Step 2: Convert to fraction form
    13,479.20/20,218.80 = 7,647.20/x
  3. Step 3: Cross multiply
    13,479.20x = 20,218.80 × 7,647.20
  4. Step 4: Simplify right side
    13,479.20x = 154,617,207.36
  5. Step 5: Solve for x
    x = 154,617,207.36/13,479.20
  6. Step 6: Final answer
    x = 11,470.80

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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.