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Finding the Fourth Proportional to 21,763.77, 32,640.90 and 9,917.07

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Solution

The fourth proportional to 21,763.77, 32,640.90 and 9,917.07 is: 14,873.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,763.77 : 32,640.90 = 9,917.07 : x
  2. Step 2: Convert to fraction form
    21,763.77/32,640.90 = 9,917.07/x
  3. Step 3: Cross multiply
    21,763.77x = 32,640.90 × 9,917.07
  4. Step 4: Simplify right side
    21,763.77x = 323,702,090.16
  5. Step 5: Solve for x
    x = 323,702,090.16/21,763.77
  6. Step 6: Final answer
    x = 14,873.44

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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.