Home / 5,121.29-7,681.92-1,611.60

Finding the Fourth Proportional to 5,121.29, 7,681.92 and 1,611.60

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Solution

The fourth proportional to 5,121.29, 7,681.92 and 1,611.60 is: 2,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.29 : 7,681.92 = 1,611.60 : x
  2. Step 2: Convert to fraction form
    5,121.29/7,681.92 = 1,611.60/x
  3. Step 3: Cross multiply
    5,121.29x = 7,681.92 × 1,611.60
  4. Step 4: Simplify right side
    5,121.29x = 12,380,182.27
  5. Step 5: Solve for x
    x = 12,380,182.27/5,121.29
  6. Step 6: Final answer
    x = 2,417.40

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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.