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Finding the Fourth Proportional to 18,570.65, 27,855.70 and 7,477.05

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Solution

The fourth proportional to 18,570.65, 27,855.70 and 7,477.05 is: 11,215.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,570.65 : 27,855.70 = 7,477.05 : x
  2. Step 2: Convert to fraction form
    18,570.65/27,855.70 = 7,477.05/x
  3. Step 3: Cross multiply
    18,570.65x = 27,855.70 × 7,477.05
  4. Step 4: Simplify right side
    18,570.65x = 208,278,527.87
  5. Step 5: Solve for x
    x = 208,278,527.87/18,570.65
  6. Step 6: Final answer
    x = 11,215.47

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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.