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Finding the Fourth Proportional to 7,210,683.99, 9,950,978.79 and 3,947,497.74

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Solution

The fourth proportional to 7,210,683.99, 9,950,978.79 and 3,947,497.74 is: 5,447,675.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,210,683.99 : 9,950,978.79 = 3,947,497.74 : x
  2. Step 2: Convert to fraction form
    7,210,683.99/9,950,978.79 = 3,947,497.74/x
  3. Step 3: Cross multiply
    7,210,683.99x = 9,950,978.79 × 3,947,497.74
  4. Step 4: Simplify right side
    7,210,683.99x = 39,281,466,284,312.93
  5. Step 5: Solve for x
    x = 39,281,466,284,312.93/7,210,683.99
  6. Step 6: Final answer
    x = 5,447,675.47

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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.