Home / 31,440.62-43,392.30-28,783.28

Finding the Fourth Proportional to 31,440.62, 43,392.30 and 28,783.28

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Solution

The fourth proportional to 31,440.62, 43,392.30 and 28,783.28 is: 39,724.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,440.62 : 43,392.30 = 28,783.28 : x
  2. Step 2: Convert to fraction form
    31,440.62/43,392.30 = 28,783.28/x
  3. Step 3: Cross multiply
    31,440.62x = 43,392.30 × 28,783.28
  4. Step 4: Simplify right side
    31,440.62x = 1,248,972,720.74
  5. Step 5: Solve for x
    x = 1,248,972,720.74/31,440.62
  6. Step 6: Final answer
    x = 39,724.81

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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.