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Finding the Fourth Proportional to 15,692.34, 21,656.48 and 8,618.83

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Solution

The fourth proportional to 15,692.34, 21,656.48 and 8,618.83 is: 11,894.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,692.34 : 21,656.48 = 8,618.83 : x
  2. Step 2: Convert to fraction form
    15,692.34/21,656.48 = 8,618.83/x
  3. Step 3: Cross multiply
    15,692.34x = 21,656.48 × 8,618.83
  4. Step 4: Simplify right side
    15,692.34x = 186,653,519.52
  5. Step 5: Solve for x
    x = 186,653,519.52/15,692.34
  6. Step 6: Final answer
    x = 11,894.56

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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.