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Finding the Fourth Proportional to 15,718.91, 21,692.19 and 8,548.91

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Solution

The fourth proportional to 15,718.91, 21,692.19 and 8,548.91 is: 11,797.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.91 : 21,692.19 = 8,548.91 : x
  2. Step 2: Convert to fraction form
    15,718.91/21,692.19 = 8,548.91/x
  3. Step 3: Cross multiply
    15,718.91x = 21,692.19 × 8,548.91
  4. Step 4: Simplify right side
    15,718.91x = 185,444,537.27
  5. Step 5: Solve for x
    x = 185,444,537.27/15,718.91
  6. Step 6: Final answer
    x = 11,797.54

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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.