Home / 12,370.40-18,577.20-11,981.60

Finding the Fourth Proportional to 12,370.40, 18,577.20 and 11,981.60

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Solution

The fourth proportional to 12,370.40, 18,577.20 and 11,981.60 is: 17,993.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,370.40 : 18,577.20 = 11,981.60 : x
  2. Step 2: Convert to fraction form
    12,370.40/18,577.20 = 11,981.60/x
  3. Step 3: Cross multiply
    12,370.40x = 18,577.20 × 11,981.60
  4. Step 4: Simplify right side
    12,370.40x = 222,584,579.52
  5. Step 5: Solve for x
    x = 222,584,579.52/12,370.40
  6. Step 6: Final answer
    x = 17,993.32

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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.