Home / 13,207.80-19,811.70-5,422.20

Finding the Fourth Proportional to 13,207.80, 19,811.70 and 5,422.20

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Solution

The fourth proportional to 13,207.80, 19,811.70 and 5,422.20 is: 8,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,207.80 : 19,811.70 = 5,422.20 : x
  2. Step 2: Convert to fraction form
    13,207.80/19,811.70 = 5,422.20/x
  3. Step 3: Cross multiply
    13,207.80x = 19,811.70 × 5,422.20
  4. Step 4: Simplify right side
    13,207.80x = 107,422,999.74
  5. Step 5: Solve for x
    x = 107,422,999.74/13,207.80
  6. Step 6: Final answer
    x = 8,133.30

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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.