Home / 31,816.61-43,954.08-20,940.40

Finding the Fourth Proportional to 31,816.61, 43,954.08 and 20,940.40

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Solution

The fourth proportional to 31,816.61, 43,954.08 and 20,940.40 is: 28,928.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,816.61 : 43,954.08 = 20,940.40 : x
  2. Step 2: Convert to fraction form
    31,816.61/43,954.08 = 20,940.40/x
  3. Step 3: Cross multiply
    31,816.61x = 43,954.08 × 20,940.40
  4. Step 4: Simplify right side
    31,816.61x = 920,415,797.06
  5. Step 5: Solve for x
    x = 920,415,797.06/31,816.61
  6. Step 6: Final answer
    x = 28,928.78

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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.