Home / 20,742.96-31,120.52-6,702.68

Finding the Fourth Proportional to 20,742.96, 31,120.52 and 6,702.68

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Solution

The fourth proportional to 20,742.96, 31,120.52 and 6,702.68 is: 10,055.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.96 : 31,120.52 = 6,702.68 : x
  2. Step 2: Convert to fraction form
    20,742.96/31,120.52 = 6,702.68/x
  3. Step 3: Cross multiply
    20,742.96x = 31,120.52 × 6,702.68
  4. Step 4: Simplify right side
    20,742.96x = 208,590,886.99
  5. Step 5: Solve for x
    x = 208,590,886.99/20,742.96
  6. Step 6: Final answer
    x = 10,055.98

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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.