Home / 20,931.10-28,884.46-11,370.87

Finding the Fourth Proportional to 20,931.10, 28,884.46 and 11,370.87

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Solution

The fourth proportional to 20,931.10, 28,884.46 and 11,370.87 is: 15,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.10 : 28,884.46 = 11,370.87 : x
  2. Step 2: Convert to fraction form
    20,931.10/28,884.46 = 11,370.87/x
  3. Step 3: Cross multiply
    20,931.10x = 28,884.46 × 11,370.87
  4. Step 4: Simplify right side
    20,931.10x = 328,441,439.68
  5. Step 5: Solve for x
    x = 328,441,439.68/20,931.10
  6. Step 6: Final answer
    x = 15,691.55

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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.