Home / 15,486.39-21,348.72-11,447.28

Finding the Fourth Proportional to 15,486.39, 21,348.72 and 11,447.28

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Solution

The fourth proportional to 15,486.39, 21,348.72 and 11,447.28 is: 15,780.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.39 : 21,348.72 = 11,447.28 : x
  2. Step 2: Convert to fraction form
    15,486.39/21,348.72 = 11,447.28/x
  3. Step 3: Cross multiply
    15,486.39x = 21,348.72 × 11,447.28
  4. Step 4: Simplify right side
    15,486.39x = 244,384,775.48
  5. Step 5: Solve for x
    x = 244,384,775.48/15,486.39
  6. Step 6: Final answer
    x = 15,780.62

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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.