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Finding the Fourth Proportional to 25,485.74, 38,226.72 and 7,955

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Solution

The fourth proportional to 25,485.74, 38,226.72 and 7,955 is: 11,931.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,485.74 : 38,226.72 = 7,955 : x
  2. Step 2: Convert to fraction form
    25,485.74/38,226.72 = 7,955/x
  3. Step 3: Cross multiply
    25,485.74x = 38,226.72 × 7,955
  4. Step 4: Simplify right side
    25,485.74x = 304,093,557.60
  5. Step 5: Solve for x
    x = 304,093,557.60/25,485.74
  6. Step 6: Final answer
    x = 11,931.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.