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Finding the Fourth Proportional to 12,165.48, 18,248.22 and 2,931.48

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Solution

The fourth proportional to 12,165.48, 18,248.22 and 2,931.48 is: 4,397.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.48 : 18,248.22 = 2,931.48 : x
  2. Step 2: Convert to fraction form
    12,165.48/18,248.22 = 2,931.48/x
  3. Step 3: Cross multiply
    12,165.48x = 18,248.22 × 2,931.48
  4. Step 4: Simplify right side
    12,165.48x = 53,494,291.97
  5. Step 5: Solve for x
    x = 53,494,291.97/12,165.48
  6. Step 6: Final answer
    x = 4,397.22

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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.