Home / 28,208.72-38,930.76-15,636.56

Finding the Fourth Proportional to 28,208.72, 38,930.76 and 15,636.56

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Solution

The fourth proportional to 28,208.72, 38,930.76 and 15,636.56 is: 21,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.72 : 38,930.76 = 15,636.56 : x
  2. Step 2: Convert to fraction form
    28,208.72/38,930.76 = 15,636.56/x
  3. Step 3: Cross multiply
    28,208.72x = 38,930.76 × 15,636.56
  4. Step 4: Simplify right side
    28,208.72x = 608,743,164.59
  5. Step 5: Solve for x
    x = 608,743,164.59/28,208.72
  6. Step 6: Final answer
    x = 21,579.96

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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.