Home / 31,423.91-43,374.20-18,686.07

Finding the Fourth Proportional to 31,423.91, 43,374.20 and 18,686.07

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Solution

The fourth proportional to 31,423.91, 43,374.20 and 18,686.07 is: 25,792.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,423.91 : 43,374.20 = 18,686.07 : x
  2. Step 2: Convert to fraction form
    31,423.91/43,374.20 = 18,686.07/x
  3. Step 3: Cross multiply
    31,423.91x = 43,374.20 × 18,686.07
  4. Step 4: Simplify right side
    31,423.91x = 810,493,246.70
  5. Step 5: Solve for x
    x = 810,493,246.70/31,423.91
  6. Step 6: Final answer
    x = 25,792.24

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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.