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Finding the Fourth Proportional to 20,652,111.60, 30,978,167.40 and 18,420,059.40

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Solution

The fourth proportional to 20,652,111.60, 30,978,167.40 and 18,420,059.40 is: 27,630,089.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652,111.60 : 30,978,167.40 = 18,420,059.40 : x
  2. Step 2: Convert to fraction form
    20,652,111.60/30,978,167.40 = 18,420,059.40/x
  3. Step 3: Cross multiply
    20,652,111.60x = 30,978,167.40 × 18,420,059.40
  4. Step 4: Simplify right side
    20,652,111.60x = 570,619,683,611,143.50
  5. Step 5: Solve for x
    x = 570,619,683,611,143.50/20,652,111.60
  6. Step 6: Final answer
    x = 27,630,089.10

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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.