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Finding the Fourth Proportional to 15,135.51, 20,882.03 and 9,164.91

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Solution

The fourth proportional to 15,135.51, 20,882.03 and 9,164.91 is: 12,644.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,135.51 : 20,882.03 = 9,164.91 : x
  2. Step 2: Convert to fraction form
    15,135.51/20,882.03 = 9,164.91/x
  3. Step 3: Cross multiply
    15,135.51x = 20,882.03 × 9,164.91
  4. Step 4: Simplify right side
    15,135.51x = 191,381,879.74
  5. Step 5: Solve for x
    x = 191,381,879.74/15,135.51
  6. Step 6: Final answer
    x = 12,644.56

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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.