Home / 12,820.20-19,215.90-6,577.80

Finding the Fourth Proportional to 12,820.20, 19,215.90 and 6,577.80

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Solution

The fourth proportional to 12,820.20, 19,215.90 and 6,577.80 is: 9,859.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.20 : 19,215.90 = 6,577.80 : x
  2. Step 2: Convert to fraction form
    12,820.20/19,215.90 = 6,577.80/x
  3. Step 3: Cross multiply
    12,820.20x = 19,215.90 × 6,577.80
  4. Step 4: Simplify right side
    12,820.20x = 126,398,347.02
  5. Step 5: Solve for x
    x = 126,398,347.02/12,820.20
  6. Step 6: Final answer
    x = 9,859.31

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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.