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Finding the Fourth Proportional to 39,762.93, 59,664.84 and 21,990.33

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Solution

The fourth proportional to 39,762.93, 59,664.84 and 21,990.33 is: 32,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,762.93 : 59,664.84 = 21,990.33 : x
  2. Step 2: Convert to fraction form
    39,762.93/59,664.84 = 21,990.33/x
  3. Step 3: Cross multiply
    39,762.93x = 59,664.84 × 21,990.33
  4. Step 4: Simplify right side
    39,762.93x = 1,312,049,521.00
  5. Step 5: Solve for x
    x = 1,312,049,521.00/39,762.93
  6. Step 6: Final answer
    x = 32,996.80

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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.