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Finding the Fourth Proportional to 12,391.79, 18,593.18 and 5,010.66

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Solution

The fourth proportional to 12,391.79, 18,593.18 and 5,010.66 is: 7,518.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,391.79 : 18,593.18 = 5,010.66 : x
  2. Step 2: Convert to fraction form
    12,391.79/18,593.18 = 5,010.66/x
  3. Step 3: Cross multiply
    12,391.79x = 18,593.18 × 5,010.66
  4. Step 4: Simplify right side
    12,391.79x = 93,164,078.25
  5. Step 5: Solve for x
    x = 93,164,078.25/12,391.79
  6. Step 6: Final answer
    x = 7,518.21

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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.