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Finding the Fourth Proportional to 21,195, 31,792.50 and 6,603

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Solution

The fourth proportional to 21,195, 31,792.50 and 6,603 is: 9,904.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195 : 31,792.50 = 6,603 : x
  2. Step 2: Convert to fraction form
    21,195/31,792.50 = 6,603/x
  3. Step 3: Cross multiply
    21,195x = 31,792.50 × 6,603
  4. Step 4: Simplify right side
    21,195x = 209,925,877.50
  5. Step 5: Solve for x
    x = 209,925,877.50/21,195
  6. Step 6: Final answer
    x = 9,904.50

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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.