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Finding the Fourth Proportional to 15,832.61, 21,849.65 and 8,758.91

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Solution

The fourth proportional to 15,832.61, 21,849.65 and 8,758.91 is: 12,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,832.61 : 21,849.65 = 8,758.91 : x
  2. Step 2: Convert to fraction form
    15,832.61/21,849.65 = 8,758.91/x
  3. Step 3: Cross multiply
    15,832.61x = 21,849.65 × 8,758.91
  4. Step 4: Simplify right side
    15,832.61x = 191,379,074.09
  5. Step 5: Solve for x
    x = 191,379,074.09/15,832.61
  6. Step 6: Final answer
    x = 12,087.65

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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.