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Finding the Fourth Proportional to 15,011.68, 20,716.51 and 8,297.42

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Solution

The fourth proportional to 15,011.68, 20,716.51 and 8,297.42 is: 11,450.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.68 : 20,716.51 = 8,297.42 : x
  2. Step 2: Convert to fraction form
    15,011.68/20,716.51 = 8,297.42/x
  3. Step 3: Cross multiply
    15,011.68x = 20,716.51 × 8,297.42
  4. Step 4: Simplify right side
    15,011.68x = 171,893,460.08
  5. Step 5: Solve for x
    x = 171,893,460.08/15,011.68
  6. Step 6: Final answer
    x = 11,450.65

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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.