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Finding the Fourth Proportional to 15,062.15, 20,785.94 and 8,347.89

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Solution

The fourth proportional to 15,062.15, 20,785.94 and 8,347.89 is: 11,520.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,062.15 : 20,785.94 = 8,347.89 : x
  2. Step 2: Convert to fraction form
    15,062.15/20,785.94 = 8,347.89/x
  3. Step 3: Cross multiply
    15,062.15x = 20,785.94 × 8,347.89
  4. Step 4: Simplify right side
    15,062.15x = 173,518,698.93
  5. Step 5: Solve for x
    x = 173,518,698.93/15,062.15
  6. Step 6: Final answer
    x = 11,520.19

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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.