Home / 20,678.96-31,023.65-6,640.25

Finding the Fourth Proportional to 20,678.96, 31,023.65 and 6,640.25

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Solution

The fourth proportional to 20,678.96, 31,023.65 and 6,640.25 is: 9,962.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.96 : 31,023.65 = 6,640.25 : x
  2. Step 2: Convert to fraction form
    20,678.96/31,023.65 = 6,640.25/x
  3. Step 3: Cross multiply
    20,678.96x = 31,023.65 × 6,640.25
  4. Step 4: Simplify right side
    20,678.96x = 206,004,603.59
  5. Step 5: Solve for x
    x = 206,004,603.59/20,678.96
  6. Step 6: Final answer
    x = 9,962.04

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1.5x scale

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.