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Finding the Fourth Proportional to 18,615.68, 27,927.64 and 6,139.56

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Solution

The fourth proportional to 18,615.68, 27,927.64 and 6,139.56 is: 9,210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,615.68 : 27,927.64 = 6,139.56 : x
  2. Step 2: Convert to fraction form
    18,615.68/27,927.64 = 6,139.56/x
  3. Step 3: Cross multiply
    18,615.68x = 27,927.64 × 6,139.56
  4. Step 4: Simplify right side
    18,615.68x = 171,463,421.44
  5. Step 5: Solve for x
    x = 171,463,421.44/18,615.68
  6. Step 6: Final answer
    x = 9,210.70

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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.