Home / 31,378.40-47,029.20-13,829.60

Finding the Fourth Proportional to 31,378.40, 47,029.20 and 13,829.60

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Solution

The fourth proportional to 31,378.40, 47,029.20 and 13,829.60 is: 20,727.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.40 : 47,029.20 = 13,829.60 : x
  2. Step 2: Convert to fraction form
    31,378.40/47,029.20 = 13,829.60/x
  3. Step 3: Cross multiply
    31,378.40x = 47,029.20 × 13,829.60
  4. Step 4: Simplify right side
    31,378.40x = 650,395,024.32
  5. Step 5: Solve for x
    x = 650,395,024.32/31,378.40
  6. Step 6: Final answer
    x = 20,727.48

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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.