Home / 20,986.34-31,480.52-6,947.64

Finding the Fourth Proportional to 20,986.34, 31,480.52 and 6,947.64

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Solution

The fourth proportional to 20,986.34, 31,480.52 and 6,947.64 is: 10,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.34 : 31,480.52 = 6,947.64 : x
  2. Step 2: Convert to fraction form
    20,986.34/31,480.52 = 6,947.64/x
  3. Step 3: Cross multiply
    20,986.34x = 31,480.52 × 6,947.64
  4. Step 4: Simplify right side
    20,986.34x = 218,715,285.23
  5. Step 5: Solve for x
    x = 218,715,285.23/20,986.34
  6. Step 6: Final answer
    x = 10,421.80

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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.