Home / 15,511.43-21,351.74-13,518.56

Finding the Fourth Proportional to 15,511.43, 21,351.74 and 13,518.56

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Solution

The fourth proportional to 15,511.43, 21,351.74 and 13,518.56 is: 18,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.43 : 21,351.74 = 13,518.56 : x
  2. Step 2: Convert to fraction form
    15,511.43/21,351.74 = 13,518.56/x
  3. Step 3: Cross multiply
    15,511.43x = 21,351.74 × 13,518.56
  4. Step 4: Simplify right side
    15,511.43x = 288,644,764.08
  5. Step 5: Solve for x
    x = 288,644,764.08/15,511.43
  6. Step 6: Final answer
    x = 18,608.52

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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.