Home / 20,738.40-31,107.60-6,887.40

Finding the Fourth Proportional to 20,738.40, 31,107.60 and 6,887.40

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Solution

The fourth proportional to 20,738.40, 31,107.60 and 6,887.40 is: 10,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.40 : 31,107.60 = 6,887.40 : x
  2. Step 2: Convert to fraction form
    20,738.40/31,107.60 = 6,887.40/x
  3. Step 3: Cross multiply
    20,738.40x = 31,107.60 × 6,887.40
  4. Step 4: Simplify right side
    20,738.40x = 214,250,484.24
  5. Step 5: Solve for x
    x = 214,250,484.24/20,738.40
  6. Step 6: Final answer
    x = 10,331.10

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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.