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Finding the Fourth Proportional to 31,851.83, 43,960.83 and 18,430.94

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Solution

The fourth proportional to 31,851.83, 43,960.83 and 18,430.94 is: 25,437.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.83 : 43,960.83 = 18,430.94 : x
  2. Step 2: Convert to fraction form
    31,851.83/43,960.83 = 18,430.94/x
  3. Step 3: Cross multiply
    31,851.83x = 43,960.83 × 18,430.94
  4. Step 4: Simplify right side
    31,851.83x = 810,239,460.87
  5. Step 5: Solve for x
    x = 810,239,460.87/31,851.83
  6. Step 6: Final answer
    x = 25,437.77

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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.