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Finding the Fourth Proportional to 31,740.42, 43,800.07 and 18,310.86

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Solution

The fourth proportional to 31,740.42, 43,800.07 and 18,310.86 is: 25,268.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,740.42 : 43,800.07 = 18,310.86 : x
  2. Step 2: Convert to fraction form
    31,740.42/43,800.07 = 18,310.86/x
  3. Step 3: Cross multiply
    31,740.42x = 43,800.07 × 18,310.86
  4. Step 4: Simplify right side
    31,740.42x = 802,016,949.76
  5. Step 5: Solve for x
    x = 802,016,949.76/31,740.42
  6. Step 6: Final answer
    x = 25,268.00

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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.