Home / 31,411.82-43,331.01-19,905.68

Finding the Fourth Proportional to 31,411.82, 43,331.01 and 19,905.68

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Solution

The fourth proportional to 31,411.82, 43,331.01 and 19,905.68 is: 27,458.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,411.82 : 43,331.01 = 19,905.68 : x
  2. Step 2: Convert to fraction form
    31,411.82/43,331.01 = 19,905.68/x
  3. Step 3: Cross multiply
    31,411.82x = 43,331.01 × 19,905.68
  4. Step 4: Simplify right side
    31,411.82x = 862,533,219.14
  5. Step 5: Solve for x
    x = 862,533,219.14/31,411.82
  6. Step 6: Final answer
    x = 27,458.87

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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.