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Finding the Fourth Proportional to 15,161.66, 20,921.67 and 11,184.98

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Solution

The fourth proportional to 15,161.66, 20,921.67 and 11,184.98 is: 15,434.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.66 : 20,921.67 = 11,184.98 : x
  2. Step 2: Convert to fraction form
    15,161.66/20,921.67 = 11,184.98/x
  3. Step 3: Cross multiply
    15,161.66x = 20,921.67 × 11,184.98
  4. Step 4: Simplify right side
    15,161.66x = 234,008,460.52
  5. Step 5: Solve for x
    x = 234,008,460.52/15,161.66
  6. Step 6: Final answer
    x = 15,434.22

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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.