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Finding the Fourth Proportional to 62,640, 93,960 and 18,864

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Solution

The fourth proportional to 62,640, 93,960 and 18,864 is: 28,296

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,640 : 93,960 = 18,864 : x
  2. Step 2: Convert to fraction form
    62,640/93,960 = 18,864/x
  3. Step 3: Cross multiply
    62,640x = 93,960 × 18,864
  4. Step 4: Simplify right side
    62,640x = 1,772,461,440
  5. Step 5: Solve for x
    x = 1,772,461,440/62,640
  6. Step 6: Final answer
    x = 28,296

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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.