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Finding the Fourth Proportional to 21,611.56, 32,430.18 and 9,299.56

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Solution

The fourth proportional to 21,611.56, 32,430.18 and 9,299.56 is: 13,954.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.56 : 32,430.18 = 9,299.56 : x
  2. Step 2: Convert to fraction form
    21,611.56/32,430.18 = 9,299.56/x
  3. Step 3: Cross multiply
    21,611.56x = 32,430.18 × 9,299.56
  4. Step 4: Simplify right side
    21,611.56x = 301,586,404.72
  5. Step 5: Solve for x
    x = 301,586,404.72/21,611.56
  6. Step 6: Final answer
    x = 13,954.87

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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.