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Finding the Fourth Proportional to 18,605.43, 27,907.79 and 5,457.51

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Solution

The fourth proportional to 18,605.43, 27,907.79 and 5,457.51 is: 8,186.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.43 : 27,907.79 = 5,457.51 : x
  2. Step 2: Convert to fraction form
    18,605.43/27,907.79 = 5,457.51/x
  3. Step 3: Cross multiply
    18,605.43x = 27,907.79 × 5,457.51
  4. Step 4: Simplify right side
    18,605.43x = 152,307,015.72
  5. Step 5: Solve for x
    x = 152,307,015.72/18,605.43
  6. Step 6: Final answer
    x = 8,186.16

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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.