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Finding the Fourth Proportional to 18,907.63, 28,362.84 and 5,760.03

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Solution

The fourth proportional to 18,907.63, 28,362.84 and 5,760.03 is: 8,640.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.63 : 28,362.84 = 5,760.03 : x
  2. Step 2: Convert to fraction form
    18,907.63/28,362.84 = 5,760.03/x
  3. Step 3: Cross multiply
    18,907.63x = 28,362.84 × 5,760.03
  4. Step 4: Simplify right side
    18,907.63x = 163,370,809.29
  5. Step 5: Solve for x
    x = 163,370,809.29/18,907.63
  6. Step 6: Final answer
    x = 8,640.47

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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.