Home / 12,851.80-19,277.70-7,214.20

Finding the Fourth Proportional to 12,851.80, 19,277.70 and 7,214.20

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Solution

The fourth proportional to 12,851.80, 19,277.70 and 7,214.20 is: 10,821.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,851.80 : 19,277.70 = 7,214.20 : x
  2. Step 2: Convert to fraction form
    12,851.80/19,277.70 = 7,214.20/x
  3. Step 3: Cross multiply
    12,851.80x = 19,277.70 × 7,214.20
  4. Step 4: Simplify right side
    12,851.80x = 139,073,183.34
  5. Step 5: Solve for x
    x = 139,073,183.34/12,851.80
  6. Step 6: Final answer
    x = 10,821.30

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Similar ratio
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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.