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Finding the Fourth Proportional to 38,603.50, 53,272.83 and 20,939.50

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Solution

The fourth proportional to 38,603.50, 53,272.83 and 20,939.50 is: 28,896.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,603.50 : 53,272.83 = 20,939.50 : x
  2. Step 2: Convert to fraction form
    38,603.50/53,272.83 = 20,939.50/x
  3. Step 3: Cross multiply
    38,603.50x = 53,272.83 × 20,939.50
  4. Step 4: Simplify right side
    38,603.50x = 1,115,506,423.79
  5. Step 5: Solve for x
    x = 1,115,506,423.79/38,603.50
  6. Step 6: Final answer
    x = 28,896.51

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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.