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Finding the Fourth Proportional to 10,368.30, 15,540.30 and 5,435.40

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Solution

The fourth proportional to 10,368.30, 15,540.30 and 5,435.40 is: 8,146.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,368.30 : 15,540.30 = 5,435.40 : x
  2. Step 2: Convert to fraction form
    10,368.30/15,540.30 = 5,435.40/x
  3. Step 3: Cross multiply
    10,368.30x = 15,540.30 × 5,435.40
  4. Step 4: Simplify right side
    10,368.30x = 84,467,746.62
  5. Step 5: Solve for x
    x = 84,467,746.62/10,368.30
  6. Step 6: Final answer
    x = 8,146.73

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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.