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Finding the Fourth Proportional to 18,758.34, 28,112.88 and 13,804.74

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Solution

The fourth proportional to 18,758.34, 28,112.88 and 13,804.74 is: 20,688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.34 : 28,112.88 = 13,804.74 : x
  2. Step 2: Convert to fraction form
    18,758.34/28,112.88 = 13,804.74/x
  3. Step 3: Cross multiply
    18,758.34x = 28,112.88 × 13,804.74
  4. Step 4: Simplify right side
    18,758.34x = 388,090,999.05
  5. Step 5: Solve for x
    x = 388,090,999.05/18,758.34
  6. Step 6: Final answer
    x = 20,688.98

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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.