Home / 20,648.40-28,491.60-12,154.80

Finding the Fourth Proportional to 20,648.40, 28,491.60 and 12,154.80

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Solution

The fourth proportional to 20,648.40, 28,491.60 and 12,154.80 is: 16,771.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.40 : 28,491.60 = 12,154.80 : x
  2. Step 2: Convert to fraction form
    20,648.40/28,491.60 = 12,154.80/x
  3. Step 3: Cross multiply
    20,648.40x = 28,491.60 × 12,154.80
  4. Step 4: Simplify right side
    20,648.40x = 346,309,699.68
  5. Step 5: Solve for x
    x = 346,309,699.68/20,648.40
  6. Step 6: Final answer
    x = 16,771.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.