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Finding the Third Proportional to 7,781,618 and 12,431,316

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Solution

The third proportional to 7,781,618 and 12,431,316 is: 19,859,316.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781,618 : 12,431,316 = 12,431,316 : x
  2. Step 2: Convert to fraction form
    7,781,618/12,431,316 = 12,431,316/x
  3. Step 3: Cross multiply
    7,781,618x = 12,431,316 × 12,431,316
  4. Step 4: Simplify right side
    7,781,618x = 154,537,617,491,856
  5. Step 5: Solve for x
    x = 154,537,617,491,856/7,781,618
  6. Step 6: Final answer
    x = 19,859,316.85

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.