Home / 31,422.57-47,107.27-13,639.86

Finding the Fourth Proportional to 31,422.57, 47,107.27 and 13,639.86

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Solution

The fourth proportional to 31,422.57, 47,107.27 and 13,639.86 is: 20,448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,422.57 : 47,107.27 = 13,639.86 : x
  2. Step 2: Convert to fraction form
    31,422.57/47,107.27 = 13,639.86/x
  3. Step 3: Cross multiply
    31,422.57x = 47,107.27 × 13,639.86
  4. Step 4: Simplify right side
    31,422.57x = 642,536,584.83
  5. Step 5: Solve for x
    x = 642,536,584.83/31,422.57
  6. Step 6: Final answer
    x = 20,448.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.