Home / 5,515.42-7,611.10-3,157.40

Finding the Fourth Proportional to 5,515.42, 7,611.10 and 3,157.40

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Solution

The fourth proportional to 5,515.42, 7,611.10 and 3,157.40 is: 4,357.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515.42 : 7,611.10 = 3,157.40 : x
  2. Step 2: Convert to fraction form
    5,515.42/7,611.10 = 3,157.40/x
  3. Step 3: Cross multiply
    5,515.42x = 7,611.10 × 3,157.40
  4. Step 4: Simplify right side
    5,515.42x = 24,031,287.14
  5. Step 5: Solve for x
    x = 24,031,287.14/5,515.42
  6. Step 6: Final answer
    x = 4,357.11

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1.5x scale

Why These Related Problems?

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