Home / 10,855.36-14,981.38-6,139.54

Finding the Fourth Proportional to 10,855.36, 14,981.38 and 6,139.54

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Solution

The fourth proportional to 10,855.36, 14,981.38 and 6,139.54 is: 8,473.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,855.36 : 14,981.38 = 6,139.54 : x
  2. Step 2: Convert to fraction form
    10,855.36/14,981.38 = 6,139.54/x
  3. Step 3: Cross multiply
    10,855.36x = 14,981.38 × 6,139.54
  4. Step 4: Simplify right side
    10,855.36x = 91,978,781.77
  5. Step 5: Solve for x
    x = 91,978,781.77/10,855.36
  6. Step 6: Final answer
    x = 8,473.12

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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.