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Finding the Fourth Proportional to 25,515, 38,274.66 and 7,047

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Solution

The fourth proportional to 25,515, 38,274.66 and 7,047 is: 10,571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,515 : 38,274.66 = 7,047 : x
  2. Step 2: Convert to fraction form
    25,515/38,274.66 = 7,047/x
  3. Step 3: Cross multiply
    25,515x = 38,274.66 × 7,047
  4. Step 4: Simplify right side
    25,515x = 269,721,529.02
  5. Step 5: Solve for x
    x = 269,721,529.02/25,515
  6. Step 6: Final answer
    x = 10,571.10

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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.