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Finding the Fourth Proportional to 15,611.52, 21,532.62 and 9,940.68

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Solution

The fourth proportional to 15,611.52, 21,532.62 and 9,940.68 is: 13,710.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.52 : 21,532.62 = 9,940.68 : x
  2. Step 2: Convert to fraction form
    15,611.52/21,532.62 = 9,940.68/x
  3. Step 3: Cross multiply
    15,611.52x = 21,532.62 × 9,940.68
  4. Step 4: Simplify right side
    15,611.52x = 214,048,884.98
  5. Step 5: Solve for x
    x = 214,048,884.98/15,611.52
  6. Step 6: Final answer
    x = 13,710.96

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1.5x scale

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.