Home / 31,690.10-43,718.61-19,107.86

Finding the Fourth Proportional to 31,690.10, 43,718.61 and 19,107.86

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Solution

The fourth proportional to 31,690.10, 43,718.61 and 19,107.86 is: 26,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.10 : 43,718.61 = 19,107.86 : x
  2. Step 2: Convert to fraction form
    31,690.10/43,718.61 = 19,107.86/x
  3. Step 3: Cross multiply
    31,690.10x = 43,718.61 × 19,107.86
  4. Step 4: Simplify right side
    31,690.10x = 835,369,079.27
  5. Step 5: Solve for x
    x = 835,369,079.27/31,690.10
  6. Step 6: Final answer
    x = 26,360.57

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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.