Home / 10,187.20-15,280.80-3,611.20

Finding the Fourth Proportional to 10,187.20, 15,280.80 and 3,611.20

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Solution

The fourth proportional to 10,187.20, 15,280.80 and 3,611.20 is: 5,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,187.20 : 15,280.80 = 3,611.20 : x
  2. Step 2: Convert to fraction form
    10,187.20/15,280.80 = 3,611.20/x
  3. Step 3: Cross multiply
    10,187.20x = 15,280.80 × 3,611.20
  4. Step 4: Simplify right side
    10,187.20x = 55,182,024.96
  5. Step 5: Solve for x
    x = 55,182,024.96/10,187.20
  6. Step 6: Final answer
    x = 5,416.80

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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.