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Finding the Fourth Proportional to 13,201, 19,776.78 and 6,619.48

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Solution

The fourth proportional to 13,201, 19,776.78 and 6,619.48 is: 9,916.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,201 : 19,776.78 = 6,619.48 : x
  2. Step 2: Convert to fraction form
    13,201/19,776.78 = 6,619.48/x
  3. Step 3: Cross multiply
    13,201x = 19,776.78 × 6,619.48
  4. Step 4: Simplify right side
    13,201x = 130,911,999.67
  5. Step 5: Solve for x
    x = 130,911,999.67/13,201
  6. Step 6: Final answer
    x = 9,916.82

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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.