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Finding the Fourth Proportional to 14,993,139.80, 21,032,911 and 14,993,139.80

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Solution

The fourth proportional to 14,993,139.80, 21,032,911 and 14,993,139.80 is: 21,032,911

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993,139.80 : 21,032,911 = 14,993,139.80 : x
  2. Step 2: Convert to fraction form
    14,993,139.80/21,032,911 = 14,993,139.80/x
  3. Step 3: Cross multiply
    14,993,139.80x = 21,032,911 × 14,993,139.80
  4. Step 4: Simplify right side
    14,993,139.80x = 315,349,375,023,957.81
  5. Step 5: Solve for x
    x = 315,349,375,023,957.81/14,993,139.80
  6. Step 6: Final answer
    x = 21,032,911

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.