Home / 31,406.40-47,109.60-10,629.90

Finding the Fourth Proportional to 31,406.40, 47,109.60 and 10,629.90

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Solution

The fourth proportional to 31,406.40, 47,109.60 and 10,629.90 is: 15,944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,406.40 : 47,109.60 = 10,629.90 : x
  2. Step 2: Convert to fraction form
    31,406.40/47,109.60 = 10,629.90/x
  3. Step 3: Cross multiply
    31,406.40x = 47,109.60 × 10,629.90
  4. Step 4: Simplify right side
    31,406.40x = 500,770,337.04
  5. Step 5: Solve for x
    x = 500,770,337.04/31,406.40
  6. Step 6: Final answer
    x = 15,944.85

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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.