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Finding the Fourth Proportional to 18,810.10, 28,211.10 and 8,280.10

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Solution

The fourth proportional to 18,810.10, 28,211.10 and 8,280.10 is: 12,418.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.10 : 28,211.10 = 8,280.10 : x
  2. Step 2: Convert to fraction form
    18,810.10/28,211.10 = 8,280.10/x
  3. Step 3: Cross multiply
    18,810.10x = 28,211.10 × 8,280.10
  4. Step 4: Simplify right side
    18,810.10x = 233,590,729.11
  5. Step 5: Solve for x
    x = 233,590,729.11/18,810.10
  6. Step 6: Final answer
    x = 12,418.37

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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.