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Finding the Fourth Proportional to 39,072, 58,617.72 and 11,370

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Solution

The fourth proportional to 39,072, 58,617.72 and 11,370 is: 17,057.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,072 : 58,617.72 = 11,370 : x
  2. Step 2: Convert to fraction form
    39,072/58,617.72 = 11,370/x
  3. Step 3: Cross multiply
    39,072x = 58,617.72 × 11,370
  4. Step 4: Simplify right side
    39,072x = 666,483,476.40
  5. Step 5: Solve for x
    x = 666,483,476.40/39,072
  6. Step 6: Final answer
    x = 17,057.83

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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.