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Finding the Fourth Proportional to 15,271.50, 21,074.70 and 8,647.50

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Solution

The fourth proportional to 15,271.50, 21,074.70 and 8,647.50 is: 11,933.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,271.50 : 21,074.70 = 8,647.50 : x
  2. Step 2: Convert to fraction form
    15,271.50/21,074.70 = 8,647.50/x
  3. Step 3: Cross multiply
    15,271.50x = 21,074.70 × 8,647.50
  4. Step 4: Simplify right side
    15,271.50x = 182,243,468.25
  5. Step 5: Solve for x
    x = 182,243,468.25/15,271.50
  6. Step 6: Final answer
    x = 11,933.57

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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.