Home / 20,840.70-31,212.45-14,231.10

Finding the Fourth Proportional to 20,840.70, 31,212.45 and 14,231.10

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Solution

The fourth proportional to 20,840.70, 31,212.45 and 14,231.10 is: 21,313.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.70 : 31,212.45 = 14,231.10 : x
  2. Step 2: Convert to fraction form
    20,840.70/31,212.45 = 14,231.10/x
  3. Step 3: Cross multiply
    20,840.70x = 31,212.45 × 14,231.10
  4. Step 4: Simplify right side
    20,840.70x = 444,187,497.20
  5. Step 5: Solve for x
    x = 444,187,497.20/20,840.70
  6. Step 6: Final answer
    x = 21,313.46

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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.