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Finding the Fourth Proportional to 30,611.82, 45,931.77 and 18,156.54

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Solution

The fourth proportional to 30,611.82, 45,931.77 and 18,156.54 is: 27,243.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,611.82 : 45,931.77 = 18,156.54 : x
  2. Step 2: Convert to fraction form
    30,611.82/45,931.77 = 18,156.54/x
  3. Step 3: Cross multiply
    30,611.82x = 45,931.77 × 18,156.54
  4. Step 4: Simplify right side
    30,611.82x = 833,962,019.28
  5. Step 5: Solve for x
    x = 833,962,019.28/30,611.82
  6. Step 6: Final answer
    x = 27,243.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.