Home / 13,855.29-19,115.56-7,885.46

Finding the Fourth Proportional to 13,855.29, 19,115.56 and 7,885.46

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Solution

The fourth proportional to 13,855.29, 19,115.56 and 7,885.46 is: 10,879.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.29 : 19,115.56 = 7,885.46 : x
  2. Step 2: Convert to fraction form
    13,855.29/19,115.56 = 7,885.46/x
  3. Step 3: Cross multiply
    13,855.29x = 19,115.56 × 7,885.46
  4. Step 4: Simplify right side
    13,855.29x = 150,734,983.76
  5. Step 5: Solve for x
    x = 150,734,983.76/13,855.29
  6. Step 6: Final answer
    x = 10,879.24

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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.