Home / 20,318.20-28,037.70-11,365.24

Finding the Fourth Proportional to 20,318.20, 28,037.70 and 11,365.24

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Solution

The fourth proportional to 20,318.20, 28,037.70 and 11,365.24 is: 15,683.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.20 : 28,037.70 = 11,365.24 : x
  2. Step 2: Convert to fraction form
    20,318.20/28,037.70 = 11,365.24/x
  3. Step 3: Cross multiply
    20,318.20x = 28,037.70 × 11,365.24
  4. Step 4: Simplify right side
    20,318.20x = 318,655,189.55
  5. Step 5: Solve for x
    x = 318,655,189.55/20,318.20
  6. Step 6: Final answer
    x = 15,683.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.