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Finding the Fourth Proportional to 9,989,489.70, 14,978,166.69 and 3,916,946.07

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Solution

The fourth proportional to 9,989,489.70, 14,978,166.69 and 3,916,946.07 is: 5,873,039.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989,489.70 : 14,978,166.69 = 3,916,946.07 : x
  2. Step 2: Convert to fraction form
    9,989,489.70/14,978,166.69 = 3,916,946.07/x
  3. Step 3: Cross multiply
    9,989,489.70x = 14,978,166.69 × 3,916,946.07
  4. Step 4: Simplify right side
    9,989,489.70x = 58,668,671,152,200.41
  5. Step 5: Solve for x
    x = 58,668,671,152,200.41/9,989,489.70
  6. Step 6: Final answer
    x = 5,873,039.86

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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.