Home / 12,752.78-19,107.56-7,812.11

Finding the Fourth Proportional to 12,752.78, 19,107.56 and 7,812.11

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Solution

The fourth proportional to 12,752.78, 19,107.56 and 7,812.11 is: 11,704.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,752.78 : 19,107.56 = 7,812.11 : x
  2. Step 2: Convert to fraction form
    12,752.78/19,107.56 = 7,812.11/x
  3. Step 3: Cross multiply
    12,752.78x = 19,107.56 × 7,812.11
  4. Step 4: Simplify right side
    12,752.78x = 149,270,369.26
  5. Step 5: Solve for x
    x = 149,270,369.26/12,752.78
  6. Step 6: Final answer
    x = 11,704.93

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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.