Home / 31,688.17-43,739.39-18,268.37

Finding the Fourth Proportional to 31,688.17, 43,739.39 and 18,268.37

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Solution

The fourth proportional to 31,688.17, 43,739.39 and 18,268.37 is: 25,215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.17 : 43,739.39 = 18,268.37 : x
  2. Step 2: Convert to fraction form
    31,688.17/43,739.39 = 18,268.37/x
  3. Step 3: Cross multiply
    31,688.17x = 43,739.39 × 18,268.37
  4. Step 4: Simplify right side
    31,688.17x = 799,047,360.09
  5. Step 5: Solve for x
    x = 799,047,360.09/31,688.17
  6. Step 6: Final answer
    x = 25,215.95

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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.