Home / 10,986.40-16,479.60-5,440.60

Finding the Fourth Proportional to 10,986.40, 16,479.60 and 5,440.60

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Solution

The fourth proportional to 10,986.40, 16,479.60 and 5,440.60 is: 8,160.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,986.40 : 16,479.60 = 5,440.60 : x
  2. Step 2: Convert to fraction form
    10,986.40/16,479.60 = 5,440.60/x
  3. Step 3: Cross multiply
    10,986.40x = 16,479.60 × 5,440.60
  4. Step 4: Simplify right side
    10,986.40x = 89,658,911.76
  5. Step 5: Solve for x
    x = 89,658,911.76/10,986.40
  6. Step 6: Final answer
    x = 8,160.90

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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.