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Finding the Fourth Proportional to 6,662.60, 9,992.19 and 1,981.40

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Solution

The fourth proportional to 6,662.60, 9,992.19 and 1,981.40 is: 2,971.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,662.60 : 9,992.19 = 1,981.40 : x
  2. Step 2: Convert to fraction form
    6,662.60/9,992.19 = 1,981.40/x
  3. Step 3: Cross multiply
    6,662.60x = 9,992.19 × 1,981.40
  4. Step 4: Simplify right side
    6,662.60x = 19,798,475.31
  5. Step 5: Solve for x
    x = 19,798,475.31/6,662.60
  6. Step 6: Final answer
    x = 2,971.59

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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.