Home / 10,778.40-16,167.60-6,890.40

Finding the Fourth Proportional to 10,778.40, 16,167.60 and 6,890.40

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Solution

The fourth proportional to 10,778.40, 16,167.60 and 6,890.40 is: 10,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,778.40 : 16,167.60 = 6,890.40 : x
  2. Step 2: Convert to fraction form
    10,778.40/16,167.60 = 6,890.40/x
  3. Step 3: Cross multiply
    10,778.40x = 16,167.60 × 6,890.40
  4. Step 4: Simplify right side
    10,778.40x = 111,401,231.04
  5. Step 5: Solve for x
    x = 111,401,231.04/10,778.40
  6. Step 6: Final answer
    x = 10,335.60

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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.