Home / 31,394.40-43,335.64-20,787.45

Finding the Fourth Proportional to 31,394.40, 43,335.64 and 20,787.45

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Solution

The fourth proportional to 31,394.40, 43,335.64 and 20,787.45 is: 28,694.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,394.40 : 43,335.64 = 20,787.45 : x
  2. Step 2: Convert to fraction form
    31,394.40/43,335.64 = 20,787.45/x
  3. Step 3: Cross multiply
    31,394.40x = 43,335.64 × 20,787.45
  4. Step 4: Simplify right side
    31,394.40x = 900,837,449.72
  5. Step 5: Solve for x
    x = 900,837,449.72/31,394.40
  6. Step 6: Final answer
    x = 28,694.21

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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.