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Finding the Fourth Proportional to 18,315.60, 27,477.90 and 5,167.80

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Solution

The fourth proportional to 18,315.60, 27,477.90 and 5,167.80 is: 7,752.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315.60 : 27,477.90 = 5,167.80 : x
  2. Step 2: Convert to fraction form
    18,315.60/27,477.90 = 5,167.80/x
  3. Step 3: Cross multiply
    18,315.60x = 27,477.90 × 5,167.80
  4. Step 4: Simplify right side
    18,315.60x = 142,000,291.62
  5. Step 5: Solve for x
    x = 142,000,291.62/18,315.60
  6. Step 6: Final answer
    x = 7,752.97

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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.