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Finding the Fourth Proportional to 13,555.75, 18,707.03 and 7,893.80

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Solution

The fourth proportional to 13,555.75, 18,707.03 and 7,893.80 is: 10,893.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.75 : 18,707.03 = 7,893.80 : x
  2. Step 2: Convert to fraction form
    13,555.75/18,707.03 = 7,893.80/x
  3. Step 3: Cross multiply
    13,555.75x = 18,707.03 × 7,893.80
  4. Step 4: Simplify right side
    13,555.75x = 147,669,420.41
  5. Step 5: Solve for x
    x = 147,669,420.41/13,555.75
  6. Step 6: Final answer
    x = 10,893.49

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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.