Home / 15,884.85-21,876.71-15,540.47

Finding the Fourth Proportional to 15,884.85, 21,876.71 and 15,540.47

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Solution

The fourth proportional to 15,884.85, 21,876.71 and 15,540.47 is: 21,402.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,884.85 : 21,876.71 = 15,540.47 : x
  2. Step 2: Convert to fraction form
    15,884.85/21,876.71 = 15,540.47/x
  3. Step 3: Cross multiply
    15,884.85x = 21,876.71 × 15,540.47
  4. Step 4: Simplify right side
    15,884.85x = 339,974,168.37
  5. Step 5: Solve for x
    x = 339,974,168.37/15,884.85
  6. Step 6: Final answer
    x = 21,402.42

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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.