Home / 12,290.78-16,961.26-6,985.60

Finding the Fourth Proportional to 12,290.78, 16,961.26 and 6,985.60

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Solution

The fourth proportional to 12,290.78, 16,961.26 and 6,985.60 is: 9,640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.78 : 16,961.26 = 6,985.60 : x
  2. Step 2: Convert to fraction form
    12,290.78/16,961.26 = 6,985.60/x
  3. Step 3: Cross multiply
    12,290.78x = 16,961.26 × 6,985.60
  4. Step 4: Simplify right side
    12,290.78x = 118,484,577.86
  5. Step 5: Solve for x
    x = 118,484,577.86/12,290.78
  6. Step 6: Final answer
    x = 9,640.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.