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Finding the Fourth Proportional to 31,121, 46,681.50 and 9,233

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Solution

The fourth proportional to 31,121, 46,681.50 and 9,233 is: 13,849.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121 : 46,681.50 = 9,233 : x
  2. Step 2: Convert to fraction form
    31,121/46,681.50 = 9,233/x
  3. Step 3: Cross multiply
    31,121x = 46,681.50 × 9,233
  4. Step 4: Simplify right side
    31,121x = 431,010,289.50
  5. Step 5: Solve for x
    x = 431,010,289.50/31,121
  6. Step 6: Final answer
    x = 13,849.50

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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.