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Finding the Fourth Proportional to 18,579.71, 27,870.48 and 7,484.90

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Solution

The fourth proportional to 18,579.71, 27,870.48 and 7,484.90 is: 11,227.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,579.71 : 27,870.48 = 7,484.90 : x
  2. Step 2: Convert to fraction form
    18,579.71/27,870.48 = 7,484.90/x
  3. Step 3: Cross multiply
    18,579.71x = 27,870.48 × 7,484.90
  4. Step 4: Simplify right side
    18,579.71x = 208,607,616.40
  5. Step 5: Solve for x
    x = 208,607,616.40/18,579.71
  6. Step 6: Final answer
    x = 11,227.71

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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.