Home / 12,963.20-19,430.40-6,720.80

Finding the Fourth Proportional to 12,963.20, 19,430.40 and 6,720.80

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Solution

The fourth proportional to 12,963.20, 19,430.40 and 6,720.80 is: 10,073.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.20 : 19,430.40 = 6,720.80 : x
  2. Step 2: Convert to fraction form
    12,963.20/19,430.40 = 6,720.80/x
  3. Step 3: Cross multiply
    12,963.20x = 19,430.40 × 6,720.80
  4. Step 4: Simplify right side
    12,963.20x = 130,587,832.32
  5. Step 5: Solve for x
    x = 130,587,832.32/12,963.20
  6. Step 6: Final answer
    x = 10,073.73

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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.