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Finding the Fourth Proportional to 13,208,712.15, 18,454,405.65 and 13,208,712.15

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Solution

The fourth proportional to 13,208,712.15, 18,454,405.65 and 13,208,712.15 is: 18,454,405.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,208,712.15 : 18,454,405.65 = 13,208,712.15 : x
  2. Step 2: Convert to fraction form
    13,208,712.15/18,454,405.65 = 13,208,712.15/x
  3. Step 3: Cross multiply
    13,208,712.15x = 18,454,405.65 × 13,208,712.15
  4. Step 4: Simplify right side
    13,208,712.15x = 243,758,932,130,183.62
  5. Step 5: Solve for x
    x = 243,758,932,130,183.62/13,208,712.15
  6. Step 6: Final answer
    x = 18,454,405.65

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.