Home / 28,141.20-38,834.64-16,815.60

Finding the Fourth Proportional to 28,141.20, 38,834.64 and 16,815.60

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Solution

The fourth proportional to 28,141.20, 38,834.64 and 16,815.60 is: 23,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.20 : 38,834.64 = 16,815.60 : x
  2. Step 2: Convert to fraction form
    28,141.20/38,834.64 = 16,815.60/x
  3. Step 3: Cross multiply
    28,141.20x = 38,834.64 × 16,815.60
  4. Step 4: Simplify right side
    28,141.20x = 653,027,772.38
  5. Step 5: Solve for x
    x = 653,027,772.38/28,141.20
  6. Step 6: Final answer
    x = 23,205.40

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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.