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Finding the Fourth Proportional to 12,318.76, 18,477.96 and 5,741.20

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Solution

The fourth proportional to 12,318.76, 18,477.96 and 5,741.20 is: 8,611.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.76 : 18,477.96 = 5,741.20 : x
  2. Step 2: Convert to fraction form
    12,318.76/18,477.96 = 5,741.20/x
  3. Step 3: Cross multiply
    12,318.76x = 18,477.96 × 5,741.20
  4. Step 4: Simplify right side
    12,318.76x = 106,085,663.95
  5. Step 5: Solve for x
    x = 106,085,663.95/12,318.76
  6. Step 6: Final answer
    x = 8,611.72

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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.