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Finding the Fourth Proportional to 13,057.44, 18,019.44 and 7,089.18

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Solution

The fourth proportional to 13,057.44, 18,019.44 and 7,089.18 is: 9,783.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,057.44 : 18,019.44 = 7,089.18 : x
  2. Step 2: Convert to fraction form
    13,057.44/18,019.44 = 7,089.18/x
  3. Step 3: Cross multiply
    13,057.44x = 18,019.44 × 7,089.18
  4. Step 4: Simplify right side
    13,057.44x = 127,743,053.66
  5. Step 5: Solve for x
    x = 127,743,053.66/13,057.44
  6. Step 6: Final answer
    x = 9,783.16

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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.