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Finding the Fourth Proportional to 12,561.76, 17,325.18 and 11,146.48

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Solution

The fourth proportional to 12,561.76, 17,325.18 and 11,146.48 is: 15,373.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.76 : 17,325.18 = 11,146.48 : x
  2. Step 2: Convert to fraction form
    12,561.76/17,325.18 = 11,146.48/x
  3. Step 3: Cross multiply
    12,561.76x = 17,325.18 × 11,146.48
  4. Step 4: Simplify right side
    12,561.76x = 193,114,772.37
  5. Step 5: Solve for x
    x = 193,114,772.37/12,561.76
  6. Step 6: Final answer
    x = 15,373.23

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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.