Home / 20,715.54-31,066.47-8,238.66

Finding the Fourth Proportional to 20,715.54, 31,066.47 and 8,238.66

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Solution

The fourth proportional to 20,715.54, 31,066.47 and 8,238.66 is: 12,355.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.54 : 31,066.47 = 8,238.66 : x
  2. Step 2: Convert to fraction form
    20,715.54/31,066.47 = 8,238.66/x
  3. Step 3: Cross multiply
    20,715.54x = 31,066.47 × 8,238.66
  4. Step 4: Simplify right side
    20,715.54x = 255,946,083.73
  5. Step 5: Solve for x
    x = 255,946,083.73/20,715.54
  6. Step 6: Final answer
    x = 12,355.27

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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.