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Finding the Fourth Proportional to 8,640,698.40, 12,961,047.60 and 5,435,431.20

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Solution

The fourth proportional to 8,640,698.40, 12,961,047.60 and 5,435,431.20 is: 8,153,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640,698.40 : 12,961,047.60 = 5,435,431.20 : x
  2. Step 2: Convert to fraction form
    8,640,698.40/12,961,047.60 = 5,435,431.20/x
  3. Step 3: Cross multiply
    8,640,698.40x = 12,961,047.60 × 5,435,431.20
  4. Step 4: Simplify right side
    8,640,698.40x = 70,448,882,509,725.12
  5. Step 5: Solve for x
    x = 70,448,882,509,725.12/8,640,698.40
  6. Step 6: Final answer
    x = 8,153,146.80

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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.