Home / 31,190.10-43,008.28-21,101.05

Finding the Fourth Proportional to 31,190.10, 43,008.28 and 21,101.05

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Solution

The fourth proportional to 31,190.10, 43,008.28 and 21,101.05 is: 29,096.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,190.10 : 43,008.28 = 21,101.05 : x
  2. Step 2: Convert to fraction form
    31,190.10/43,008.28 = 21,101.05/x
  3. Step 3: Cross multiply
    31,190.10x = 43,008.28 × 21,101.05
  4. Step 4: Simplify right side
    31,190.10x = 907,519,866.69
  5. Step 5: Solve for x
    x = 907,519,866.69/31,190.10
  6. Step 6: Final answer
    x = 29,096.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.