Home / 20,759.79-31,150.63-12,000.86

Finding the Fourth Proportional to 20,759.79, 31,150.63 and 12,000.86

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Solution

The fourth proportional to 20,759.79, 31,150.63 and 12,000.86 is: 18,007.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.79 : 31,150.63 = 12,000.86 : x
  2. Step 2: Convert to fraction form
    20,759.79/31,150.63 = 12,000.86/x
  3. Step 3: Cross multiply
    20,759.79x = 31,150.63 × 12,000.86
  4. Step 4: Simplify right side
    20,759.79x = 373,834,258.10
  5. Step 5: Solve for x
    x = 373,834,258.10/20,759.79
  6. Step 6: Final answer
    x = 18,007.61

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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.