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Finding the Fourth Proportional to 15,692.47, 21,655.96 and 8,618.94

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Solution

The fourth proportional to 15,692.47, 21,655.96 and 8,618.94 is: 11,894.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,692.47 : 21,655.96 = 8,618.94 : x
  2. Step 2: Convert to fraction form
    15,692.47/21,655.96 = 8,618.94/x
  3. Step 3: Cross multiply
    15,692.47x = 21,655.96 × 8,618.94
  4. Step 4: Simplify right side
    15,692.47x = 186,651,398.34
  5. Step 5: Solve for x
    x = 186,651,398.34/15,692.47
  6. Step 6: Final answer
    x = 11,894.33

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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.