Home / 31,811.40-43,905.54-18,380.84

Finding the Fourth Proportional to 31,811.40, 43,905.54 and 18,380.84

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Solution

The fourth proportional to 31,811.40, 43,905.54 and 18,380.84 is: 25,368.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,811.40 : 43,905.54 = 18,380.84 : x
  2. Step 2: Convert to fraction form
    31,811.40/43,905.54 = 18,380.84/x
  3. Step 3: Cross multiply
    31,811.40x = 43,905.54 × 18,380.84
  4. Step 4: Simplify right side
    31,811.40x = 807,020,705.85
  5. Step 5: Solve for x
    x = 807,020,705.85/31,811.40
  6. Step 6: Final answer
    x = 25,368.92

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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.