Home / 31,423.65-47,108.97-13,640.91

Finding the Fourth Proportional to 31,423.65, 47,108.97 and 13,640.91

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Solution

The fourth proportional to 31,423.65, 47,108.97 and 13,640.91 is: 20,449.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,423.65 : 47,108.97 = 13,640.91 : x
  2. Step 2: Convert to fraction form
    31,423.65/47,108.97 = 13,640.91/x
  3. Step 3: Cross multiply
    31,423.65x = 47,108.97 × 13,640.91
  4. Step 4: Simplify right side
    31,423.65x = 642,609,219.96
  5. Step 5: Solve for x
    x = 642,609,219.96/31,423.65
  6. Step 6: Final answer
    x = 20,449.86

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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.