Home / 20,873.28-31,307.39-8,392.80

Finding the Fourth Proportional to 20,873.28, 31,307.39 and 8,392.80

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Solution

The fourth proportional to 20,873.28, 31,307.39 and 8,392.80 is: 12,588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.28 : 31,307.39 = 8,392.80 : x
  2. Step 2: Convert to fraction form
    20,873.28/31,307.39 = 8,392.80/x
  3. Step 3: Cross multiply
    20,873.28x = 31,307.39 × 8,392.80
  4. Step 4: Simplify right side
    20,873.28x = 262,756,662.79
  5. Step 5: Solve for x
    x = 262,756,662.79/20,873.28
  6. Step 6: Final answer
    x = 12,588.18

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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.