Home / 20,274.81-30,423.12-8,436.75

Finding the Fourth Proportional to 20,274.81, 30,423.12 and 8,436.75

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Solution

The fourth proportional to 20,274.81, 30,423.12 and 8,436.75 is: 12,659.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,274.81 : 30,423.12 = 8,436.75 : x
  2. Step 2: Convert to fraction form
    20,274.81/30,423.12 = 8,436.75/x
  3. Step 3: Cross multiply
    20,274.81x = 30,423.12 × 8,436.75
  4. Step 4: Simplify right side
    20,274.81x = 256,672,257.66
  5. Step 5: Solve for x
    x = 256,672,257.66/20,274.81
  6. Step 6: Final answer
    x = 12,659.66

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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.