Home / 13,856.10-19,121.16-7,806.36

Finding the Fourth Proportional to 13,856.10, 19,121.16 and 7,806.36

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Solution

The fourth proportional to 13,856.10, 19,121.16 and 7,806.36 is: 10,772.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.10 : 19,121.16 = 7,806.36 : x
  2. Step 2: Convert to fraction form
    13,856.10/19,121.16 = 7,806.36/x
  3. Step 3: Cross multiply
    13,856.10x = 19,121.16 × 7,806.36
  4. Step 4: Simplify right side
    13,856.10x = 149,266,658.58
  5. Step 5: Solve for x
    x = 149,266,658.58/13,856.10
  6. Step 6: Final answer
    x = 10,772.63

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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.