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Finding the Third Proportional to 15,429,385.50 and 21,015,543

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Solution

The third proportional to 15,429,385.50 and 21,015,543 is: 28,624,150.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429,385.50 : 21,015,543 = 21,015,543 : x
  2. Step 2: Convert to fraction form
    15,429,385.50/21,015,543 = 21,015,543/x
  3. Step 3: Cross multiply
    15,429,385.50x = 21,015,543 × 21,015,543
  4. Step 4: Simplify right side
    15,429,385.50x = 441,653,047,584,849
  5. Step 5: Solve for x
    x = 441,653,047,584,849/15,429,385.50
  6. Step 6: Final answer
    x = 28,624,150.17

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.