Home / 10,438.16-15,659.64-3,418.40

Finding the Fourth Proportional to 10,438.16, 15,659.64 and 3,418.40

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Solution

The fourth proportional to 10,438.16, 15,659.64 and 3,418.40 is: 5,128.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,438.16 : 15,659.64 = 3,418.40 : x
  2. Step 2: Convert to fraction form
    10,438.16/15,659.64 = 3,418.40/x
  3. Step 3: Cross multiply
    10,438.16x = 15,659.64 × 3,418.40
  4. Step 4: Simplify right side
    10,438.16x = 53,530,913.38
  5. Step 5: Solve for x
    x = 53,530,913.38/10,438.16
  6. Step 6: Final answer
    x = 5,128.39

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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.