Home / 20,720.60-31,056.60-10,854.80

Finding the Fourth Proportional to 20,720.60, 31,056.60 and 10,854.80

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Solution

The fourth proportional to 20,720.60, 31,056.60 and 10,854.80 is: 16,269.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.60 : 31,056.60 = 10,854.80 : x
  2. Step 2: Convert to fraction form
    20,720.60/31,056.60 = 10,854.80/x
  3. Step 3: Cross multiply
    20,720.60x = 31,056.60 × 10,854.80
  4. Step 4: Simplify right side
    20,720.60x = 337,113,181.68
  5. Step 5: Solve for x
    x = 337,113,181.68/20,720.60
  6. Step 6: Final answer
    x = 16,269.47

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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.