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Finding the Fourth Proportional to 18,397,210.20, 27,595,815.30 and 12,657,647.40

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Solution

The fourth proportional to 18,397,210.20, 27,595,815.30 and 12,657,647.40 is: 18,986,471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,397,210.20 : 27,595,815.30 = 12,657,647.40 : x
  2. Step 2: Convert to fraction form
    18,397,210.20/27,595,815.30 = 12,657,647.40/x
  3. Step 3: Cross multiply
    18,397,210.20x = 27,595,815.30 × 12,657,647.40
  4. Step 4: Simplify right side
    18,397,210.20x = 349,298,099,782,925.25
  5. Step 5: Solve for x
    x = 349,298,099,782,925.25/18,397,210.20
  6. Step 6: Final answer
    x = 18,986,471.10

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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.