Home / 31,394.12-43,335.27-20,787.17

Finding the Fourth Proportional to 31,394.12, 43,335.27 and 20,787.17

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Solution

The fourth proportional to 31,394.12, 43,335.27 and 20,787.17 is: 28,693.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,394.12 : 43,335.27 = 20,787.17 : x
  2. Step 2: Convert to fraction form
    31,394.12/43,335.27 = 20,787.17/x
  3. Step 3: Cross multiply
    31,394.12x = 43,335.27 × 20,787.17
  4. Step 4: Simplify right side
    31,394.12x = 900,817,407.81
  5. Step 5: Solve for x
    x = 900,817,407.81/31,394.12
  6. Step 6: Final answer
    x = 28,693.83

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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.