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Finding the Fourth Proportional to 18,815.30, 28,232.12 and 8,283.98

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Solution

The fourth proportional to 18,815.30, 28,232.12 and 8,283.98 is: 12,430.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.30 : 28,232.12 = 8,283.98 : x
  2. Step 2: Convert to fraction form
    18,815.30/28,232.12 = 8,283.98/x
  3. Step 3: Cross multiply
    18,815.30x = 28,232.12 × 8,283.98
  4. Step 4: Simplify right side
    18,815.30x = 233,874,276.02
  5. Step 5: Solve for x
    x = 233,874,276.02/18,815.30
  6. Step 6: Final answer
    x = 12,430.01

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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.