Home / 8,415.68-11,611.50-5,621.72

Finding the Fourth Proportional to 8,415.68, 11,611.50 and 5,621.72

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Solution

The fourth proportional to 8,415.68, 11,611.50 and 5,621.72 is: 7,756.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.68 : 11,611.50 = 5,621.72 : x
  2. Step 2: Convert to fraction form
    8,415.68/11,611.50 = 5,621.72/x
  3. Step 3: Cross multiply
    8,415.68x = 11,611.50 × 5,621.72
  4. Step 4: Simplify right side
    8,415.68x = 65,276,601.78
  5. Step 5: Solve for x
    x = 65,276,601.78/8,415.68
  6. Step 6: Final answer
    x = 7,756.55

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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.