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Finding the Fourth Proportional to 18,737.76, 25,857.80 and 10,239.60

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Solution

The fourth proportional to 18,737.76, 25,857.80 and 10,239.60 is: 14,130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,737.76 : 25,857.80 = 10,239.60 : x
  2. Step 2: Convert to fraction form
    18,737.76/25,857.80 = 10,239.60/x
  3. Step 3: Cross multiply
    18,737.76x = 25,857.80 × 10,239.60
  4. Step 4: Simplify right side
    18,737.76x = 264,773,528.88
  5. Step 5: Solve for x
    x = 264,773,528.88/18,737.76
  6. Step 6: Final answer
    x = 14,130.48

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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.