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Finding the Fourth Proportional to 6,817,955.86, 9,408,978.74 and 3,720,678.81

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Solution

The fourth proportional to 6,817,955.86, 9,408,978.74 and 3,720,678.81 is: 5,134,645.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,817,955.86 : 9,408,978.74 = 3,720,678.81 : x
  2. Step 2: Convert to fraction form
    6,817,955.86/9,408,978.74 = 3,720,678.81/x
  3. Step 3: Cross multiply
    6,817,955.86x = 9,408,978.74 × 3,720,678.81
  4. Step 4: Simplify right side
    6,817,955.86x = 35,007,787,756,010.21
  5. Step 5: Solve for x
    x = 35,007,787,756,010.21/6,817,955.86
  6. Step 6: Final answer
    x = 5,134,645.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.