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Finding the Fourth Proportional to 19,683,991.60, 29,525,987.40 and 18,928,164.40

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Solution

The fourth proportional to 19,683,991.60, 29,525,987.40 and 18,928,164.40 is: 28,392,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,683,991.60 : 29,525,987.40 = 18,928,164.40 : x
  2. Step 2: Convert to fraction form
    19,683,991.60/29,525,987.40 = 18,928,164.40/x
  3. Step 3: Cross multiply
    19,683,991.60x = 29,525,987.40 × 18,928,164.40
  4. Step 4: Simplify right side
    19,683,991.60x = 558,872,743,579,528.50
  5. Step 5: Solve for x
    x = 558,872,743,579,528.50/19,683,991.60
  6. Step 6: Final answer
    x = 28,392,246.60

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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.