Home / 28,209.72-38,930.94-15,635.64

Finding the Fourth Proportional to 28,209.72, 38,930.94 and 15,635.64

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Solution

The fourth proportional to 28,209.72, 38,930.94 and 15,635.64 is: 21,578.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.72 : 38,930.94 = 15,635.64 : x
  2. Step 2: Convert to fraction form
    28,209.72/38,930.94 = 15,635.64/x
  3. Step 3: Cross multiply
    28,209.72x = 38,930.94 × 15,635.64
  4. Step 4: Simplify right side
    28,209.72x = 608,710,162.70
  5. Step 5: Solve for x
    x = 608,710,162.70/28,209.72
  6. Step 6: Final answer
    x = 21,578.03

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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.