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Finding the Fourth Proportional to 28,369, 42,572.94 and 9,901

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Solution

The fourth proportional to 28,369, 42,572.94 and 9,901 is: 14,858.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,369 : 42,572.94 = 9,901 : x
  2. Step 2: Convert to fraction form
    28,369/42,572.94 = 9,901/x
  3. Step 3: Cross multiply
    28,369x = 42,572.94 × 9,901
  4. Step 4: Simplify right side
    28,369x = 421,514,678.94
  5. Step 5: Solve for x
    x = 421,514,678.94/28,369
  6. Step 6: Final answer
    x = 14,858.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.