Home / 20,931.14-28,884.42-11,499.72

Finding the Fourth Proportional to 20,931.14, 28,884.42 and 11,499.72

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Solution

The fourth proportional to 20,931.14, 28,884.42 and 11,499.72 is: 15,869.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.14 : 28,884.42 = 11,499.72 : x
  2. Step 2: Convert to fraction form
    20,931.14/28,884.42 = 11,499.72/x
  3. Step 3: Cross multiply
    20,931.14x = 28,884.42 × 11,499.72
  4. Step 4: Simplify right side
    20,931.14x = 332,162,742.36
  5. Step 5: Solve for x
    x = 332,162,742.36/20,931.14
  6. Step 6: Final answer
    x = 15,869.31

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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.