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Finding the Fourth Proportional to 15,660.55, 21,611.46 and 8,587

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Solution

The fourth proportional to 15,660.55, 21,611.46 and 8,587 is: 11,850.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.55 : 21,611.46 = 8,587 : x
  2. Step 2: Convert to fraction form
    15,660.55/21,611.46 = 8,587/x
  3. Step 3: Cross multiply
    15,660.55x = 21,611.46 × 8,587
  4. Step 4: Simplify right side
    15,660.55x = 185,577,607.02
  5. Step 5: Solve for x
    x = 185,577,607.02/15,660.55
  6. Step 6: Final answer
    x = 11,850.01

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.