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Finding the Fourth Proportional to 15,019.58, 20,727.45 and 8,213.99

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Solution

The fourth proportional to 15,019.58, 20,727.45 and 8,213.99 is: 11,335.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.58 : 20,727.45 = 8,213.99 : x
  2. Step 2: Convert to fraction form
    15,019.58/20,727.45 = 8,213.99/x
  3. Step 3: Cross multiply
    15,019.58x = 20,727.45 × 8,213.99
  4. Step 4: Simplify right side
    15,019.58x = 170,255,118.84
  5. Step 5: Solve for x
    x = 170,255,118.84/15,019.58
  6. Step 6: Final answer
    x = 11,335.55

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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.