Home / 20,694.36-31,021.50-8,210.28

Finding the Fourth Proportional to 20,694.36, 31,021.50 and 8,210.28

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Solution

The fourth proportional to 20,694.36, 31,021.50 and 8,210.28 is: 12,307.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,694.36 : 31,021.50 = 8,210.28 : x
  2. Step 2: Convert to fraction form
    20,694.36/31,021.50 = 8,210.28/x
  3. Step 3: Cross multiply
    20,694.36x = 31,021.50 × 8,210.28
  4. Step 4: Simplify right side
    20,694.36x = 254,695,201.02
  5. Step 5: Solve for x
    x = 254,695,201.02/20,694.36
  6. Step 6: Final answer
    x = 12,307.47

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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.