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Finding the Fourth Proportional to 13,477.76, 18,600.80 and 8,172.80

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Solution

The fourth proportional to 13,477.76, 18,600.80 and 8,172.80 is: 11,279.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,477.76 : 18,600.80 = 8,172.80 : x
  2. Step 2: Convert to fraction form
    13,477.76/18,600.80 = 8,172.80/x
  3. Step 3: Cross multiply
    13,477.76x = 18,600.80 × 8,172.80
  4. Step 4: Simplify right side
    13,477.76x = 152,020,618.24
  5. Step 5: Solve for x
    x = 152,020,618.24/13,477.76
  6. Step 6: Final answer
    x = 11,279.37

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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.