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Finding the Fourth Proportional to 18,617.61, 25,692.56 and 10,119.90

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Solution

The fourth proportional to 18,617.61, 25,692.56 and 10,119.90 is: 13,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,617.61 : 25,692.56 = 10,119.90 : x
  2. Step 2: Convert to fraction form
    18,617.61/25,692.56 = 10,119.90/x
  3. Step 3: Cross multiply
    18,617.61x = 25,692.56 × 10,119.90
  4. Step 4: Simplify right side
    18,617.61x = 260,006,087.34
  5. Step 5: Solve for x
    x = 260,006,087.34/18,617.61
  6. Step 6: Final answer
    x = 13,965.60

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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.