Home / 15,212.52-21,003.15-13,616.40

Finding the Fourth Proportional to 15,212.52, 21,003.15 and 13,616.40

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Solution

The fourth proportional to 15,212.52, 21,003.15 and 13,616.40 is: 18,799.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.52 : 21,003.15 = 13,616.40 : x
  2. Step 2: Convert to fraction form
    15,212.52/21,003.15 = 13,616.40/x
  3. Step 3: Cross multiply
    15,212.52x = 21,003.15 × 13,616.40
  4. Step 4: Simplify right side
    15,212.52x = 285,987,291.66
  5. Step 5: Solve for x
    x = 285,987,291.66/15,212.52
  6. Step 6: Final answer
    x = 18,799.47

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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.