Home / 13,191.40-19,782.30-4,426.60

Finding the Fourth Proportional to 13,191.40, 19,782.30 and 4,426.60

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Solution

The fourth proportional to 13,191.40, 19,782.30 and 4,426.60 is: 6,638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.40 : 19,782.30 = 4,426.60 : x
  2. Step 2: Convert to fraction form
    13,191.40/19,782.30 = 4,426.60/x
  3. Step 3: Cross multiply
    13,191.40x = 19,782.30 × 4,426.60
  4. Step 4: Simplify right side
    13,191.40x = 87,568,329.18
  5. Step 5: Solve for x
    x = 87,568,329.18/13,191.40
  6. Step 6: Final answer
    x = 6,638.29

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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.