Home / 31,431.72-43,371.60-19,490.76

Finding the Fourth Proportional to 31,431.72, 43,371.60 and 19,490.76

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Solution

The fourth proportional to 31,431.72, 43,371.60 and 19,490.76 is: 26,894.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,431.72 : 43,371.60 = 19,490.76 : x
  2. Step 2: Convert to fraction form
    31,431.72/43,371.60 = 19,490.76/x
  3. Step 3: Cross multiply
    31,431.72x = 43,371.60 × 19,490.76
  4. Step 4: Simplify right side
    31,431.72x = 845,345,446.42
  5. Step 5: Solve for x
    x = 845,345,446.42/31,431.72
  6. Step 6: Final answer
    x = 26,894.66

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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.