Home / 20,760.67-31,088.91-12,830.60

Finding the Fourth Proportional to 20,760.67, 31,088.91 and 12,830.60

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Solution

The fourth proportional to 20,760.67, 31,088.91 and 12,830.60 is: 19,213.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.67 : 31,088.91 = 12,830.60 : x
  2. Step 2: Convert to fraction form
    20,760.67/31,088.91 = 12,830.60/x
  3. Step 3: Cross multiply
    20,760.67x = 31,088.91 × 12,830.60
  4. Step 4: Simplify right side
    20,760.67x = 398,889,494.48
  5. Step 5: Solve for x
    x = 398,889,494.48/20,760.67
  6. Step 6: Final answer
    x = 19,213.71

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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.