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Finding the Fourth Proportional to 18,737.09, 25,872.08 and 11,577.40

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Solution

The fourth proportional to 18,737.09, 25,872.08 and 11,577.40 is: 15,986.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.09 : 25,872.08 = 11,577.40 : x
  2. Step 2: Convert to fraction form
    18,737.09/25,872.08 = 11,577.40/x
  3. Step 3: Cross multiply
    18,737.09x = 25,872.08 × 11,577.40
  4. Step 4: Simplify right side
    18,737.09x = 299,531,296.42
  5. Step 5: Solve for x
    x = 299,531,296.42/18,737.09
  6. Step 6: Final answer
    x = 15,986.01

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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.