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Finding the Fourth Proportional to 18,885,893.10, 28,328,839.65 and 13,146,330.30

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Solution

The fourth proportional to 18,885,893.10, 28,328,839.65 and 13,146,330.30 is: 19,719,495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885,893.10 : 28,328,839.65 = 13,146,330.30 : x
  2. Step 2: Convert to fraction form
    18,885,893.10/28,328,839.65 = 13,146,330.30/x
  3. Step 3: Cross multiply
    18,885,893.10x = 28,328,839.65 × 13,146,330.30
  4. Step 4: Simplify right side
    18,885,893.10x = 372,420,283,054,636.38
  5. Step 5: Solve for x
    x = 372,420,283,054,636.38/18,885,893.10
  6. Step 6: Final answer
    x = 19,719,495.45

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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.