Home / 5,121.14-7,681.70-1,611.12

Finding the Fourth Proportional to 5,121.14, 7,681.70 and 1,611.12

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Solution

The fourth proportional to 5,121.14, 7,681.70 and 1,611.12 is: 2,416.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.14 : 7,681.70 = 1,611.12 : x
  2. Step 2: Convert to fraction form
    5,121.14/7,681.70 = 1,611.12/x
  3. Step 3: Cross multiply
    5,121.14x = 7,681.70 × 1,611.12
  4. Step 4: Simplify right side
    5,121.14x = 12,376,140.50
  5. Step 5: Solve for x
    x = 12,376,140.50/5,121.14
  6. Step 6: Final answer
    x = 2,416.68

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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.