Home / 10,420.76-15,631.32-3,400.86

Finding the Fourth Proportional to 10,420.76, 15,631.32 and 3,400.86

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Solution

The fourth proportional to 10,420.76, 15,631.32 and 3,400.86 is: 5,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.76 : 15,631.32 = 3,400.86 : x
  2. Step 2: Convert to fraction form
    10,420.76/15,631.32 = 3,400.86/x
  3. Step 3: Cross multiply
    10,420.76x = 15,631.32 × 3,400.86
  4. Step 4: Simplify right side
    10,420.76x = 53,159,930.94
  5. Step 5: Solve for x
    x = 53,159,930.94/10,420.76
  6. Step 6: Final answer
    x = 5,101.35

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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.