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Finding the Fourth Proportional to 18,816.87, 25,968.13 and 11,261.77

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Solution

The fourth proportional to 18,816.87, 25,968.13 and 11,261.77 is: 15,541.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.87 : 25,968.13 = 11,261.77 : x
  2. Step 2: Convert to fraction form
    18,816.87/25,968.13 = 11,261.77/x
  3. Step 3: Cross multiply
    18,816.87x = 25,968.13 × 11,261.77
  4. Step 4: Simplify right side
    18,816.87x = 292,447,014.32
  5. Step 5: Solve for x
    x = 292,447,014.32/18,816.87
  6. Step 6: Final answer
    x = 15,541.74

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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.