Home / 11,278.40-16,917.60-5,122.40

Finding the Fourth Proportional to 11,278.40, 16,917.60 and 5,122.40

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Solution

The fourth proportional to 11,278.40, 16,917.60 and 5,122.40 is: 7,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,278.40 : 16,917.60 = 5,122.40 : x
  2. Step 2: Convert to fraction form
    11,278.40/16,917.60 = 5,122.40/x
  3. Step 3: Cross multiply
    11,278.40x = 16,917.60 × 5,122.40
  4. Step 4: Simplify right side
    11,278.40x = 86,658,714.24
  5. Step 5: Solve for x
    x = 86,658,714.24/11,278.40
  6. Step 6: Final answer
    x = 7,683.60

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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.