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Finding the Fourth Proportional to 18,458.64, 27,688.19 and 5,311.13

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Solution

The fourth proportional to 18,458.64, 27,688.19 and 5,311.13 is: 7,966.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.64 : 27,688.19 = 5,311.13 : x
  2. Step 2: Convert to fraction form
    18,458.64/27,688.19 = 5,311.13/x
  3. Step 3: Cross multiply
    18,458.64x = 27,688.19 × 5,311.13
  4. Step 4: Simplify right side
    18,458.64x = 147,055,411.56
  5. Step 5: Solve for x
    x = 147,055,411.56/18,458.64
  6. Step 6: Final answer
    x = 7,966.75

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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.