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Finding the Fourth Proportional to 31,706.01, 43,751.12 and 18,956.65

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Solution

The fourth proportional to 31,706.01, 43,751.12 and 18,956.65 is: 26,158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,706.01 : 43,751.12 = 18,956.65 : x
  2. Step 2: Convert to fraction form
    31,706.01/43,751.12 = 18,956.65/x
  3. Step 3: Cross multiply
    31,706.01x = 43,751.12 × 18,956.65
  4. Step 4: Simplify right side
    31,706.01x = 829,374,668.95
  5. Step 5: Solve for x
    x = 829,374,668.95/31,706.01
  6. Step 6: Final answer
    x = 26,158.28

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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.