Home / 12,610.12-18,915.20-4,290.20

Finding the Fourth Proportional to 12,610.12, 18,915.20 and 4,290.20

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Solution

The fourth proportional to 12,610.12, 18,915.20 and 4,290.20 is: 6,435.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,610.12 : 18,915.20 = 4,290.20 : x
  2. Step 2: Convert to fraction form
    12,610.12/18,915.20 = 4,290.20/x
  3. Step 3: Cross multiply
    12,610.12x = 18,915.20 × 4,290.20
  4. Step 4: Simplify right side
    12,610.12x = 81,149,991.04
  5. Step 5: Solve for x
    x = 81,149,991.04/12,610.12
  6. Step 6: Final answer
    x = 6,435.31

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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.