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Finding the Fourth Proportional to 18,617.82, 27,931.59 and 6,139.74

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Solution

The fourth proportional to 18,617.82, 27,931.59 and 6,139.74 is: 9,211.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,617.82 : 27,931.59 = 6,139.74 : x
  2. Step 2: Convert to fraction form
    18,617.82/27,931.59 = 6,139.74/x
  3. Step 3: Cross multiply
    18,617.82x = 27,931.59 × 6,139.74
  4. Step 4: Simplify right side
    18,617.82x = 171,492,700.39
  5. Step 5: Solve for x
    x = 171,492,700.39/18,617.82
  6. Step 6: Final answer
    x = 9,211.21

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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.