Home / 31,420.63-43,355.62-18,669.09

Finding the Fourth Proportional to 31,420.63, 43,355.62 and 18,669.09

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Solution

The fourth proportional to 31,420.63, 43,355.62 and 18,669.09 is: 25,760.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,420.63 : 43,355.62 = 18,669.09 : x
  2. Step 2: Convert to fraction form
    31,420.63/43,355.62 = 18,669.09/x
  3. Step 3: Cross multiply
    31,420.63x = 43,355.62 × 18,669.09
  4. Step 4: Simplify right side
    31,420.63x = 809,410,157.71
  5. Step 5: Solve for x
    x = 809,410,157.71/31,420.63
  6. Step 6: Final answer
    x = 25,760.47

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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.