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Finding the Fourth Proportional to 18,960.95, 28,420.22 and 7,103.31

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Solution

The fourth proportional to 18,960.95, 28,420.22 and 7,103.31 is: 10,647.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.95 : 28,420.22 = 7,103.31 : x
  2. Step 2: Convert to fraction form
    18,960.95/28,420.22 = 7,103.31/x
  3. Step 3: Cross multiply
    18,960.95x = 28,420.22 × 7,103.31
  4. Step 4: Simplify right side
    18,960.95x = 201,877,597.41
  5. Step 5: Solve for x
    x = 201,877,597.41/18,960.95
  6. Step 6: Final answer
    x = 10,647.02

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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.