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Finding the Fourth Proportional to 14,939,908.20, 20,616,802.02 and 8,413,511.40

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Solution

The fourth proportional to 14,939,908.20, 20,616,802.02 and 8,413,511.40 is: 11,610,492.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,939,908.20 : 20,616,802.02 = 8,413,511.40 : x
  2. Step 2: Convert to fraction form
    14,939,908.20/20,616,802.02 = 8,413,511.40/x
  3. Step 3: Cross multiply
    14,939,908.20x = 20,616,802.02 × 8,413,511.40
  4. Step 4: Simplify right side
    14,939,908.20x = 173,459,698,826,813.03
  5. Step 5: Solve for x
    x = 173,459,698,826,813.03/14,939,908.20
  6. Step 6: Final answer
    x = 11,610,492.95

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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.