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Finding the Fourth Proportional to 39,873.25, 55,024.81 and 21,967.84

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Solution

The fourth proportional to 39,873.25, 55,024.81 and 21,967.84 is: 30,315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,873.25 : 55,024.81 = 21,967.84 : x
  2. Step 2: Convert to fraction form
    39,873.25/55,024.81 = 21,967.84/x
  3. Step 3: Cross multiply
    39,873.25x = 55,024.81 × 21,967.84
  4. Step 4: Simplify right side
    39,873.25x = 1,208,776,222.11
  5. Step 5: Solve for x
    x = 1,208,776,222.11/39,873.25
  6. Step 6: Final answer
    x = 30,315.47

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1.5x scale

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.