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Finding the Fourth Proportional to 38,599, 53,266.62 and 20,935

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Solution

The fourth proportional to 38,599, 53,266.62 and 20,935 is: 28,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,599 : 53,266.62 = 20,935 : x
  2. Step 2: Convert to fraction form
    38,599/53,266.62 = 20,935/x
  3. Step 3: Cross multiply
    38,599x = 53,266.62 × 20,935
  4. Step 4: Simplify right side
    38,599x = 1,115,136,689.70
  5. Step 5: Solve for x
    x = 1,115,136,689.70/38,599
  6. Step 6: Final answer
    x = 28,890.30

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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.