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Finding the Fourth Proportional to 18,374,019.60, 27,561,029.40 and 11,991,478.80

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Solution

The fourth proportional to 18,374,019.60, 27,561,029.40 and 11,991,478.80 is: 17,987,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,374,019.60 : 27,561,029.40 = 11,991,478.80 : x
  2. Step 2: Convert to fraction form
    18,374,019.60/27,561,029.40 = 11,991,478.80/x
  3. Step 3: Cross multiply
    18,374,019.60x = 27,561,029.40 × 11,991,478.80
  4. Step 4: Simplify right side
    18,374,019.60x = 330,497,499,756,276.75
  5. Step 5: Solve for x
    x = 330,497,499,756,276.75/18,374,019.60
  6. Step 6: Final answer
    x = 17,987,218.20

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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.