Home / 20,659,991.40-30,989,987.10-19,400,279.40

Finding the Fourth Proportional to 20,659,991.40, 30,989,987.10 and 19,400,279.40

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Solution

The fourth proportional to 20,659,991.40, 30,989,987.10 and 19,400,279.40 is: 29,100,419.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659,991.40 : 30,989,987.10 = 19,400,279.40 : x
  2. Step 2: Convert to fraction form
    20,659,991.40/30,989,987.10 = 19,400,279.40/x
  3. Step 3: Cross multiply
    20,659,991.40x = 30,989,987.10 × 19,400,279.40
  4. Step 4: Simplify right side
    20,659,991.40x = 601,214,408,342,395.75
  5. Step 5: Solve for x
    x = 601,214,408,342,395.75/20,659,991.40
  6. Step 6: Final answer
    x = 29,100,419.10

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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.