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Finding the Fourth Proportional to 28,339,616.40, 42,509,424.60 and 11,302,918.80

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Solution

The fourth proportional to 28,339,616.40, 42,509,424.60 and 11,302,918.80 is: 16,954,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,339,616.40 : 42,509,424.60 = 11,302,918.80 : x
  2. Step 2: Convert to fraction form
    28,339,616.40/42,509,424.60 = 11,302,918.80/x
  3. Step 3: Cross multiply
    28,339,616.40x = 42,509,424.60 × 11,302,918.80
  4. Step 4: Simplify right side
    28,339,616.40x = 480,480,574,488,522.50
  5. Step 5: Solve for x
    x = 480,480,574,488,522.50/28,339,616.40
  6. Step 6: Final answer
    x = 16,954,378.20

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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.