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Finding the Fourth Proportional to 31,699.41, 43,742.15 and 18,950.07

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Solution

The fourth proportional to 31,699.41, 43,742.15 and 18,950.07 is: 26,149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,699.41 : 43,742.15 = 18,950.07 : x
  2. Step 2: Convert to fraction form
    31,699.41/43,742.15 = 18,950.07/x
  3. Step 3: Cross multiply
    31,699.41x = 43,742.15 × 18,950.07
  4. Step 4: Simplify right side
    31,699.41x = 828,916,804.45
  5. Step 5: Solve for x
    x = 828,916,804.45/31,699.41
  6. Step 6: Final answer
    x = 26,149.28

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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.