Home / 13,191.30-19,782.15-6,615.30

Finding the Fourth Proportional to 13,191.30, 19,782.15 and 6,615.30

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Solution

The fourth proportional to 13,191.30, 19,782.15 and 6,615.30 is: 9,920.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,191.30 : 19,782.15 = 6,615.30 : x
  2. Step 2: Convert to fraction form
    13,191.30/19,782.15 = 6,615.30/x
  3. Step 3: Cross multiply
    13,191.30x = 19,782.15 × 6,615.30
  4. Step 4: Simplify right side
    13,191.30x = 130,864,856.90
  5. Step 5: Solve for x
    x = 130,864,856.90/13,191.30
  6. Step 6: Final answer
    x = 9,920.54

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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.