Home / 12,078.90-18,118.35-6,830.10

Finding the Fourth Proportional to 12,078.90, 18,118.35 and 6,830.10

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Solution

The fourth proportional to 12,078.90, 18,118.35 and 6,830.10 is: 10,245.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.90 : 18,118.35 = 6,830.10 : x
  2. Step 2: Convert to fraction form
    12,078.90/18,118.35 = 6,830.10/x
  3. Step 3: Cross multiply
    12,078.90x = 18,118.35 × 6,830.10
  4. Step 4: Simplify right side
    12,078.90x = 123,750,142.34
  5. Step 5: Solve for x
    x = 123,750,142.34/12,078.90
  6. Step 6: Final answer
    x = 10,245.15

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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.