Home / 12,143.12-18,211.08-5,216

Finding the Fourth Proportional to 12,143.12, 18,211.08 and 5,216

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Solution

The fourth proportional to 12,143.12, 18,211.08 and 5,216 is: 7,822.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.12 : 18,211.08 = 5,216 : x
  2. Step 2: Convert to fraction form
    12,143.12/18,211.08 = 5,216/x
  3. Step 3: Cross multiply
    12,143.12x = 18,211.08 × 5,216
  4. Step 4: Simplify right side
    12,143.12x = 94,988,993.28
  5. Step 5: Solve for x
    x = 94,988,993.28/12,143.12
  6. Step 6: Final answer
    x = 7,822.45

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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.