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Finding the Fourth Proportional to 18,685,719.10, 28,028,578.65 and 18,685,719.10

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Solution

The fourth proportional to 18,685,719.10, 28,028,578.65 and 18,685,719.10 is: 28,028,578.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,685,719.10 : 28,028,578.65 = 18,685,719.10 : x
  2. Step 2: Convert to fraction form
    18,685,719.10/28,028,578.65 = 18,685,719.10/x
  3. Step 3: Cross multiply
    18,685,719.10x = 28,028,578.65 × 18,685,719.10
  4. Step 4: Simplify right side
    18,685,719.10x = 523,734,147,426,157.25
  5. Step 5: Solve for x
    x = 523,734,147,426,157.25/18,685,719.10
  6. Step 6: Final answer
    x = 28,028,578.65

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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.