Home / 20,255.13-30,369.51-8,405.64

Finding the Fourth Proportional to 20,255.13, 30,369.51 and 8,405.64

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Solution

The fourth proportional to 20,255.13, 30,369.51 and 8,405.64 is: 12,602.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.13 : 30,369.51 = 8,405.64 : x
  2. Step 2: Convert to fraction form
    20,255.13/30,369.51 = 8,405.64/x
  3. Step 3: Cross multiply
    20,255.13x = 30,369.51 × 8,405.64
  4. Step 4: Simplify right side
    20,255.13x = 255,275,168.04
  5. Step 5: Solve for x
    x = 255,275,168.04/20,255.13
  6. Step 6: Final answer
    x = 12,602.99

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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.