Home / 31,355.39-43,290.70-19,431.38

Finding the Fourth Proportional to 31,355.39, 43,290.70 and 19,431.38

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Solution

The fourth proportional to 31,355.39, 43,290.70 and 19,431.38 is: 26,827.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,355.39 : 43,290.70 = 19,431.38 : x
  2. Step 2: Convert to fraction form
    31,355.39/43,290.70 = 19,431.38/x
  3. Step 3: Cross multiply
    31,355.39x = 43,290.70 × 19,431.38
  4. Step 4: Simplify right side
    31,355.39x = 841,197,777.13
  5. Step 5: Solve for x
    x = 841,197,777.13/31,355.39
  6. Step 6: Final answer
    x = 26,827.86

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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.