Home / 15,431.25-21,295.34-8,625

Finding the Fourth Proportional to 15,431.25, 21,295.34 and 8,625

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Solution

The fourth proportional to 15,431.25, 21,295.34 and 8,625 is: 11,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.25 : 21,295.34 = 8,625 : x
  2. Step 2: Convert to fraction form
    15,431.25/21,295.34 = 8,625/x
  3. Step 3: Cross multiply
    15,431.25x = 21,295.34 × 8,625
  4. Step 4: Simplify right side
    15,431.25x = 183,672,307.50
  5. Step 5: Solve for x
    x = 183,672,307.50/15,431.25
  6. Step 6: Final answer
    x = 11,902.62

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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.