Home / 31,619.11-43,583.70-21,406.93

Finding the Fourth Proportional to 31,619.11, 43,583.70 and 21,406.93

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Solution

The fourth proportional to 31,619.11, 43,583.70 and 21,406.93 is: 29,507.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,619.11 : 43,583.70 = 21,406.93 : x
  2. Step 2: Convert to fraction form
    31,619.11/43,583.70 = 21,406.93/x
  3. Step 3: Cross multiply
    31,619.11x = 43,583.70 × 21,406.93
  4. Step 4: Simplify right side
    31,619.11x = 932,993,215.04
  5. Step 5: Solve for x
    x = 932,993,215.04/31,619.11
  6. Step 6: Final answer
    x = 29,507.26

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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.