Home / 20,913.82-31,364.08-6,870.59

Finding the Fourth Proportional to 20,913.82, 31,364.08 and 6,870.59

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Solution

The fourth proportional to 20,913.82, 31,364.08 and 6,870.59 is: 10,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.82 : 31,364.08 = 6,870.59 : x
  2. Step 2: Convert to fraction form
    20,913.82/31,364.08 = 6,870.59/x
  3. Step 3: Cross multiply
    20,913.82x = 31,364.08 × 6,870.59
  4. Step 4: Simplify right side
    20,913.82x = 215,489,734.41
  5. Step 5: Solve for x
    x = 215,489,734.41/20,913.82
  6. Step 6: Final answer
    x = 10,303.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.