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Finding the Third Proportional to 15,728,389.50 and 21,250,031.25

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Solution

The third proportional to 15,728,389.50 and 21,250,031.25 is: 28,710,112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728,389.50 : 21,250,031.25 = 21,250,031.25 : x
  2. Step 2: Convert to fraction form
    15,728,389.50/21,250,031.25 = 21,250,031.25/x
  3. Step 3: Cross multiply
    15,728,389.50x = 21,250,031.25 × 21,250,031.25
  4. Step 4: Simplify right side
    15,728,389.50x = 451,563,828,125,976.56
  5. Step 5: Solve for x
    x = 451,563,828,125,976.56/15,728,389.50
  6. Step 6: Final answer
    x = 28,710,112.25

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.