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Finding the Fourth Proportional to 12,661.80, 19,007.10 and 7,470.60

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Solution

The fourth proportional to 12,661.80, 19,007.10 and 7,470.60 is: 11,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.80 : 19,007.10 = 7,470.60 : x
  2. Step 2: Convert to fraction form
    12,661.80/19,007.10 = 7,470.60/x
  3. Step 3: Cross multiply
    12,661.80x = 19,007.10 × 7,470.60
  4. Step 4: Simplify right side
    12,661.80x = 141,994,441.26
  5. Step 5: Solve for x
    x = 141,994,441.26/12,661.80
  6. Step 6: Final answer
    x = 11,214.40

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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.