Home / 12,820.12-19,229.62-9,077.21

Finding the Fourth Proportional to 12,820.12, 19,229.62 and 9,077.21

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Solution

The fourth proportional to 12,820.12, 19,229.62 and 9,077.21 is: 13,615.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.12 : 19,229.62 = 9,077.21 : x
  2. Step 2: Convert to fraction form
    12,820.12/19,229.62 = 9,077.21/x
  3. Step 3: Cross multiply
    12,820.12x = 19,229.62 × 9,077.21
  4. Step 4: Simplify right side
    12,820.12x = 174,551,417.68
  5. Step 5: Solve for x
    x = 174,551,417.68/12,820.12
  6. Step 6: Final answer
    x = 13,615.42

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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.