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Finding the Fourth Proportional to 31,340, 43,247.76 and 18,771.68

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Solution

The fourth proportional to 31,340, 43,247.76 and 18,771.68 is: 25,904.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,340 : 43,247.76 = 18,771.68 : x
  2. Step 2: Convert to fraction form
    31,340/43,247.76 = 18,771.68/x
  3. Step 3: Cross multiply
    31,340x = 43,247.76 × 18,771.68
  4. Step 4: Simplify right side
    31,340x = 811,833,111.44
  5. Step 5: Solve for x
    x = 811,833,111.44/31,340
  6. Step 6: Final answer
    x = 25,904.06

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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.