Home / 13,110.64-18,218.36-12,975.78

Finding the Fourth Proportional to 13,110.64, 18,218.36 and 12,975.78

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Solution

The fourth proportional to 13,110.64, 18,218.36 and 12,975.78 is: 18,030.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.64 : 18,218.36 = 12,975.78 : x
  2. Step 2: Convert to fraction form
    13,110.64/18,218.36 = 12,975.78/x
  3. Step 3: Cross multiply
    13,110.64x = 18,218.36 × 12,975.78
  4. Step 4: Simplify right side
    13,110.64x = 236,397,431.32
  5. Step 5: Solve for x
    x = 236,397,431.32/13,110.64
  6. Step 6: Final answer
    x = 18,030.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.