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Finding the Fourth Proportional to 15,563.50, 21,477.63 and 9,974.50

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Solution

The fourth proportional to 15,563.50, 21,477.63 and 9,974.50 is: 13,764.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,563.50 : 21,477.63 = 9,974.50 : x
  2. Step 2: Convert to fraction form
    15,563.50/21,477.63 = 9,974.50/x
  3. Step 3: Cross multiply
    15,563.50x = 21,477.63 × 9,974.50
  4. Step 4: Simplify right side
    15,563.50x = 214,228,620.44
  5. Step 5: Solve for x
    x = 214,228,620.44/15,563.50
  6. Step 6: Final answer
    x = 13,764.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.