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Finding the Fourth Proportional to 18,911,307.60, 28,366,961.40 and 16,679,255.40

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Solution

The fourth proportional to 18,911,307.60, 28,366,961.40 and 16,679,255.40 is: 25,018,883.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911,307.60 : 28,366,961.40 = 16,679,255.40 : x
  2. Step 2: Convert to fraction form
    18,911,307.60/28,366,961.40 = 16,679,255.40/x
  3. Step 3: Cross multiply
    18,911,307.60x = 28,366,961.40 × 16,679,255.40
  4. Step 4: Simplify right side
    18,911,307.60x = 473,139,794,112,541.56
  5. Step 5: Solve for x
    x = 473,139,794,112,541.56/18,911,307.60
  6. Step 6: Final answer
    x = 25,018,883.10

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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.