Home / 31,394.77-43,336.16-20,787.82

Finding the Fourth Proportional to 31,394.77, 43,336.16 and 20,787.82

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Solution

The fourth proportional to 31,394.77, 43,336.16 and 20,787.82 is: 28,694.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,394.77 : 43,336.16 = 20,787.82 : x
  2. Step 2: Convert to fraction form
    31,394.77/43,336.16 = 20,787.82/x
  3. Step 3: Cross multiply
    31,394.77x = 43,336.16 × 20,787.82
  4. Step 4: Simplify right side
    31,394.77x = 900,864,189.63
  5. Step 5: Solve for x
    x = 900,864,189.63/31,394.77
  6. Step 6: Final answer
    x = 28,694.72

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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.