Home / 13,862.11-19,129.78-7,812.44

Finding the Fourth Proportional to 13,862.11, 19,129.78 and 7,812.44

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Solution

The fourth proportional to 13,862.11, 19,129.78 and 7,812.44 is: 10,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,862.11 : 19,129.78 = 7,812.44 : x
  2. Step 2: Convert to fraction form
    13,862.11/19,129.78 = 7,812.44/x
  3. Step 3: Cross multiply
    13,862.11x = 19,129.78 × 7,812.44
  4. Step 4: Simplify right side
    13,862.11x = 149,450,349.46
  5. Step 5: Solve for x
    x = 149,450,349.46/13,862.11
  6. Step 6: Final answer
    x = 10,781.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.