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Finding the Fourth Proportional to 39,888.87, 55,045.80 and 21,983.41

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Solution

The fourth proportional to 39,888.87, 55,045.80 and 21,983.41 is: 30,336.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,888.87 : 55,045.80 = 21,983.41 : x
  2. Step 2: Convert to fraction form
    39,888.87/55,045.80 = 21,983.41/x
  3. Step 3: Cross multiply
    39,888.87x = 55,045.80 × 21,983.41
  4. Step 4: Simplify right side
    39,888.87x = 1,210,094,390.18
  5. Step 5: Solve for x
    x = 1,210,094,390.18/39,888.87
  6. Step 6: Final answer
    x = 30,336.64

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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.