Home / 31,535.70-43,520.31-18,109.35

Finding the Fourth Proportional to 31,535.70, 43,520.31 and 18,109.35

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Solution

The fourth proportional to 31,535.70, 43,520.31 and 18,109.35 is: 24,991.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,535.70 : 43,520.31 = 18,109.35 : x
  2. Step 2: Convert to fraction form
    31,535.70/43,520.31 = 18,109.35/x
  3. Step 3: Cross multiply
    31,535.70x = 43,520.31 × 18,109.35
  4. Step 4: Simplify right side
    31,535.70x = 788,124,525.90
  5. Step 5: Solve for x
    x = 788,124,525.90/31,535.70
  6. Step 6: Final answer
    x = 24,991.50

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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.