Home / 11,920.02-17,880.05-4,128.84

Finding the Fourth Proportional to 11,920.02, 17,880.05 and 4,128.84

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Solution

The fourth proportional to 11,920.02, 17,880.05 and 4,128.84 is: 6,193.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.02 : 17,880.05 = 4,128.84 : x
  2. Step 2: Convert to fraction form
    11,920.02/17,880.05 = 4,128.84/x
  3. Step 3: Cross multiply
    11,920.02x = 17,880.05 × 4,128.84
  4. Step 4: Simplify right side
    11,920.02x = 73,823,865.64
  5. Step 5: Solve for x
    x = 73,823,865.64/11,920.02
  6. Step 6: Final answer
    x = 6,193.27

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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.