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Finding the Fourth Proportional to 13,090.15, 18,063.48 and 7,783.98

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Solution

The fourth proportional to 13,090.15, 18,063.48 and 7,783.98 is: 10,741.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.15 : 18,063.48 = 7,783.98 : x
  2. Step 2: Convert to fraction form
    13,090.15/18,063.48 = 7,783.98/x
  3. Step 3: Cross multiply
    13,090.15x = 18,063.48 × 7,783.98
  4. Step 4: Simplify right side
    13,090.15x = 140,605,767.05
  5. Step 5: Solve for x
    x = 140,605,767.05/13,090.15
  6. Step 6: Final answer
    x = 10,741.34

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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.