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Finding the Fourth Proportional to 15,177.67, 20,943.49 and 9,210.79

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Solution

The fourth proportional to 15,177.67, 20,943.49 and 9,210.79 is: 12,709.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,177.67 : 20,943.49 = 9,210.79 : x
  2. Step 2: Convert to fraction form
    15,177.67/20,943.49 = 9,210.79/x
  3. Step 3: Cross multiply
    15,177.67x = 20,943.49 × 9,210.79
  4. Step 4: Simplify right side
    15,177.67x = 192,906,088.26
  5. Step 5: Solve for x
    x = 192,906,088.26/15,177.67
  6. Step 6: Final answer
    x = 12,709.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.