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Finding the Fourth Proportional to 18,621, 27,931.77 and 4,581.03

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Solution

The fourth proportional to 18,621, 27,931.77 and 4,581.03 is: 6,871.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,621 : 27,931.77 = 4,581.03 : x
  2. Step 2: Convert to fraction form
    18,621/27,931.77 = 4,581.03/x
  3. Step 3: Cross multiply
    18,621x = 27,931.77 × 4,581.03
  4. Step 4: Simplify right side
    18,621x = 127,956,276.32
  5. Step 5: Solve for x
    x = 127,956,276.32/18,621
  6. Step 6: Final answer
    x = 6,871.61

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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.