Home / 10,611.21-15,909.19-4,985.71

Finding the Fourth Proportional to 10,611.21, 15,909.19 and 4,985.71

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Solution

The fourth proportional to 10,611.21, 15,909.19 and 4,985.71 is: 7,474.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,611.21 : 15,909.19 = 4,985.71 : x
  2. Step 2: Convert to fraction form
    10,611.21/15,909.19 = 4,985.71/x
  3. Step 3: Cross multiply
    10,611.21x = 15,909.19 × 4,985.71
  4. Step 4: Simplify right side
    10,611.21x = 79,318,583.48
  5. Step 5: Solve for x
    x = 79,318,583.48/10,611.21
  6. Step 6: Final answer
    x = 7,474.98

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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.