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Finding the Fourth Proportional to 14,754.74, 20,357.91 and 9,015.21

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Solution

The fourth proportional to 14,754.74, 20,357.91 and 9,015.21 is: 12,438.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,754.74 : 20,357.91 = 9,015.21 : x
  2. Step 2: Convert to fraction form
    14,754.74/20,357.91 = 9,015.21/x
  3. Step 3: Cross multiply
    14,754.74x = 20,357.91 × 9,015.21
  4. Step 4: Simplify right side
    14,754.74x = 183,530,833.81
  5. Step 5: Solve for x
    x = 183,530,833.81/14,754.74
  6. Step 6: Final answer
    x = 12,438.78

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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.