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Finding the Fourth Proportional to 25,905.75, 38,858.64 and 7,437.75

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Solution

The fourth proportional to 25,905.75, 38,858.64 and 7,437.75 is: 11,156.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,905.75 : 38,858.64 = 7,437.75 : x
  2. Step 2: Convert to fraction form
    25,905.75/38,858.64 = 7,437.75/x
  3. Step 3: Cross multiply
    25,905.75x = 38,858.64 × 7,437.75
  4. Step 4: Simplify right side
    25,905.75x = 289,020,849.66
  5. Step 5: Solve for x
    x = 289,020,849.66/25,905.75
  6. Step 6: Final answer
    x = 11,156.63

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1.5x scale

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.