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Finding the Fourth Proportional to 15,065.40, 20,788.86 and 8,350.71

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Solution

The fourth proportional to 15,065.40, 20,788.86 and 8,350.71 is: 11,523.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.40 : 20,788.86 = 8,350.71 : x
  2. Step 2: Convert to fraction form
    15,065.40/20,788.86 = 8,350.71/x
  3. Step 3: Cross multiply
    15,065.40x = 20,788.86 × 8,350.71
  4. Step 4: Simplify right side
    15,065.40x = 173,601,741.09
  5. Step 5: Solve for x
    x = 173,601,741.09/15,065.40
  6. Step 6: Final answer
    x = 11,523.21

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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.