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Finding the Fourth Proportional to 18,338.50, 25,307.16 and 9,955

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Solution

The fourth proportional to 18,338.50, 25,307.16 and 9,955 is: 13,737.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,338.50 : 25,307.16 = 9,955 : x
  2. Step 2: Convert to fraction form
    18,338.50/25,307.16 = 9,955/x
  3. Step 3: Cross multiply
    18,338.50x = 25,307.16 × 9,955
  4. Step 4: Simplify right side
    18,338.50x = 251,932,777.80
  5. Step 5: Solve for x
    x = 251,932,777.80/18,338.50
  6. Step 6: Final answer
    x = 13,737.92

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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.