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Finding the Fourth Proportional to 18,894,967.70, 28,342,451.55 and 12,170,974.10

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Solution

The fourth proportional to 18,894,967.70, 28,342,451.55 and 12,170,974.10 is: 18,256,461.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894,967.70 : 28,342,451.55 = 12,170,974.10 : x
  2. Step 2: Convert to fraction form
    18,894,967.70/28,342,451.55 = 12,170,974.10/x
  3. Step 3: Cross multiply
    18,894,967.70x = 28,342,451.55 × 12,170,974.10
  4. Step 4: Simplify right side
    18,894,967.70x = 344,955,243,745,554.88
  5. Step 5: Solve for x
    x = 344,955,243,745,554.88/18,894,967.70
  6. Step 6: Final answer
    x = 18,256,461.15

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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.