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Finding the Fourth Proportional to 18,888.75, 28,323.72 and 10,993.89

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Solution

The fourth proportional to 18,888.75, 28,323.72 and 10,993.89 is: 16,485.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.75 : 28,323.72 = 10,993.89 : x
  2. Step 2: Convert to fraction form
    18,888.75/28,323.72 = 10,993.89/x
  3. Step 3: Cross multiply
    18,888.75x = 28,323.72 × 10,993.89
  4. Step 4: Simplify right side
    18,888.75x = 311,387,862.07
  5. Step 5: Solve for x
    x = 311,387,862.07/18,888.75
  6. Step 6: Final answer
    x = 16,485.36

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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.