Home / 12,611.40-18,905.10-4,711.80

Finding the Fourth Proportional to 12,611.40, 18,905.10 and 4,711.80

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Solution

The fourth proportional to 12,611.40, 18,905.10 and 4,711.80 is: 7,063.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.40 : 18,905.10 = 4,711.80 : x
  2. Step 2: Convert to fraction form
    12,611.40/18,905.10 = 4,711.80/x
  3. Step 3: Cross multiply
    12,611.40x = 18,905.10 × 4,711.80
  4. Step 4: Simplify right side
    12,611.40x = 89,077,050.18
  5. Step 5: Solve for x
    x = 89,077,050.18/12,611.40
  6. Step 6: Final answer
    x = 7,063.22

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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.