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Finding the Fourth Proportional to 18,907.64, 28,360.30 and 8,374.60

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Solution

The fourth proportional to 18,907.64, 28,360.30 and 8,374.60 is: 12,561.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.64 : 28,360.30 = 8,374.60 : x
  2. Step 2: Convert to fraction form
    18,907.64/28,360.30 = 8,374.60/x
  3. Step 3: Cross multiply
    18,907.64x = 28,360.30 × 8,374.60
  4. Step 4: Simplify right side
    18,907.64x = 237,506,168.38
  5. Step 5: Solve for x
    x = 237,506,168.38/18,907.64
  6. Step 6: Final answer
    x = 12,561.39

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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.