Home / 31,355.89-43,291.39-19,431.88

Finding the Fourth Proportional to 31,355.89, 43,291.39 and 19,431.88

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Solution

The fourth proportional to 31,355.89, 43,291.39 and 19,431.88 is: 26,828.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,355.89 : 43,291.39 = 19,431.88 : x
  2. Step 2: Convert to fraction form
    31,355.89/43,291.39 = 19,431.88/x
  3. Step 3: Cross multiply
    31,355.89x = 43,291.39 × 19,431.88
  4. Step 4: Simplify right side
    31,355.89x = 841,232,879.06
  5. Step 5: Solve for x
    x = 841,232,879.06/31,355.89
  6. Step 6: Final answer
    x = 26,828.55

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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.