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Finding the Fourth Proportional to 21,798.24, 32,700.60 and 7,944

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Solution

The fourth proportional to 21,798.24, 32,700.60 and 7,944 is: 11,917.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.24 : 32,700.60 = 7,944 : x
  2. Step 2: Convert to fraction form
    21,798.24/32,700.60 = 7,944/x
  3. Step 3: Cross multiply
    21,798.24x = 32,700.60 × 7,944
  4. Step 4: Simplify right side
    21,798.24x = 259,773,566.40
  5. Step 5: Solve for x
    x = 259,773,566.40/21,798.24
  6. Step 6: Final answer
    x = 11,917.18

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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.