Home / 13,009.20-19,470.60-11,972.40

Finding the Fourth Proportional to 13,009.20, 19,470.60 and 11,972.40

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Solution

The fourth proportional to 13,009.20, 19,470.60 and 11,972.40 is: 17,918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,009.20 : 19,470.60 = 11,972.40 : x
  2. Step 2: Convert to fraction form
    13,009.20/19,470.60 = 11,972.40/x
  3. Step 3: Cross multiply
    13,009.20x = 19,470.60 × 11,972.40
  4. Step 4: Simplify right side
    13,009.20x = 233,109,811.44
  5. Step 5: Solve for x
    x = 233,109,811.44/13,009.20
  6. Step 6: Final answer
    x = 17,918.84

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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.