Home / 20,968.40-31,452.60-8,488.40

Finding the Fourth Proportional to 20,968.40, 31,452.60 and 8,488.40

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Solution

The fourth proportional to 20,968.40, 31,452.60 and 8,488.40 is: 12,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.40 : 31,452.60 = 8,488.40 : x
  2. Step 2: Convert to fraction form
    20,968.40/31,452.60 = 8,488.40/x
  3. Step 3: Cross multiply
    20,968.40x = 31,452.60 × 8,488.40
  4. Step 4: Simplify right side
    20,968.40x = 266,982,249.84
  5. Step 5: Solve for x
    x = 266,982,249.84/20,968.40
  6. Step 6: Final answer
    x = 12,732.60

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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.