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Finding the Fourth Proportional to 13,007.20, 19,485.20 and 12,085.60

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Solution

The fourth proportional to 13,007.20, 19,485.20 and 12,085.60 is: 18,104.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,007.20 : 19,485.20 = 12,085.60 : x
  2. Step 2: Convert to fraction form
    13,007.20/19,485.20 = 12,085.60/x
  3. Step 3: Cross multiply
    13,007.20x = 19,485.20 × 12,085.60
  4. Step 4: Simplify right side
    13,007.20x = 235,490,333.12
  5. Step 5: Solve for x
    x = 235,490,333.12/13,007.20
  6. Step 6: Final answer
    x = 18,104.61

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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.