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Finding the Fourth Proportional to 18,116.51, 27,154.81 and 13,659.88

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Solution

The fourth proportional to 18,116.51, 27,154.81 and 13,659.88 is: 20,474.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,116.51 : 27,154.81 = 13,659.88 : x
  2. Step 2: Convert to fraction form
    18,116.51/27,154.81 = 13,659.88/x
  3. Step 3: Cross multiply
    18,116.51x = 27,154.81 × 13,659.88
  4. Step 4: Simplify right side
    18,116.51x = 370,931,446.02
  5. Step 5: Solve for x
    x = 370,931,446.02/18,116.51
  6. Step 6: Final answer
    x = 20,474.77

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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.