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Finding the Fourth Proportional to 8,618,864.60, 12,928,296.90 and 8,492,893.40

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Solution

The fourth proportional to 8,618,864.60, 12,928,296.90 and 8,492,893.40 is: 12,739,340.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618,864.60 : 12,928,296.90 = 8,492,893.40 : x
  2. Step 2: Convert to fraction form
    8,618,864.60/12,928,296.90 = 8,492,893.40/x
  3. Step 3: Cross multiply
    8,618,864.60x = 12,928,296.90 × 8,492,893.40
  4. Step 4: Simplify right side
    8,618,864.60x = 109,798,647,415,250.47
  5. Step 5: Solve for x
    x = 109,798,647,415,250.47/8,618,864.60
  6. Step 6: Final answer
    x = 12,739,340.10

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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.