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Finding the Fourth Proportional to 39,873.15, 55,025.19 and 21,968.01

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Solution

The fourth proportional to 39,873.15, 55,025.19 and 21,968.01 is: 30,315.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,873.15 : 55,025.19 = 21,968.01 : x
  2. Step 2: Convert to fraction form
    39,873.15/55,025.19 = 21,968.01/x
  3. Step 3: Cross multiply
    39,873.15x = 55,025.19 × 21,968.01
  4. Step 4: Simplify right side
    39,873.15x = 1,208,793,924.17
  5. Step 5: Solve for x
    x = 1,208,793,924.17/39,873.15
  6. Step 6: Final answer
    x = 30,315.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.