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Finding the Fourth Proportional to 18,415.63, 27,625.26 and 7,319.84

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Solution

The fourth proportional to 18,415.63, 27,625.26 and 7,319.84 is: 10,980.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.63 : 27,625.26 = 7,319.84 : x
  2. Step 2: Convert to fraction form
    18,415.63/27,625.26 = 7,319.84/x
  3. Step 3: Cross multiply
    18,415.63x = 27,625.26 × 7,319.84
  4. Step 4: Simplify right side
    18,415.63x = 202,212,483.16
  5. Step 5: Solve for x
    x = 202,212,483.16/18,415.63
  6. Step 6: Final answer
    x = 10,980.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.