Home / 21,819.23-30,109.76-13,335.55

Finding the Fourth Proportional to 21,819.23, 30,109.76 and 13,335.55

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Solution

The fourth proportional to 21,819.23, 30,109.76 and 13,335.55 is: 18,402.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,819.23 : 30,109.76 = 13,335.55 : x
  2. Step 2: Convert to fraction form
    21,819.23/30,109.76 = 13,335.55/x
  3. Step 3: Cross multiply
    21,819.23x = 30,109.76 × 13,335.55
  4. Step 4: Simplify right side
    21,819.23x = 401,529,992.74
  5. Step 5: Solve for x
    x = 401,529,992.74/21,819.23
  6. Step 6: Final answer
    x = 18,402.57

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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.