Home / 20,621.55-30,911.06-8,124.68

Finding the Fourth Proportional to 20,621.55, 30,911.06 and 8,124.68

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Solution

The fourth proportional to 20,621.55, 30,911.06 and 8,124.68 is: 12,178.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.55 : 30,911.06 = 8,124.68 : x
  2. Step 2: Convert to fraction form
    20,621.55/30,911.06 = 8,124.68/x
  3. Step 3: Cross multiply
    20,621.55x = 30,911.06 × 8,124.68
  4. Step 4: Simplify right side
    20,621.55x = 251,142,275.78
  5. Step 5: Solve for x
    x = 251,142,275.78/20,621.55
  6. Step 6: Final answer
    x = 12,178.63

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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.