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Finding the Third Proportional to 7,781,776 and 12,431,560

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Solution

The third proportional to 7,781,776 and 12,431,560 is: 19,859,693.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781,776 : 12,431,560 = 12,431,560 : x
  2. Step 2: Convert to fraction form
    7,781,776/12,431,560 = 12,431,560/x
  3. Step 3: Cross multiply
    7,781,776x = 12,431,560 × 12,431,560
  4. Step 4: Simplify right side
    7,781,776x = 154,543,684,033,600
  5. Step 5: Solve for x
    x = 154,543,684,033,600/7,781,776
  6. Step 6: Final answer
    x = 19,859,693.22

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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.