Home / 21,495.36-29,669.79-12,997.50

Finding the Fourth Proportional to 21,495.36, 29,669.79 and 12,997.50

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Solution

The fourth proportional to 21,495.36, 29,669.79 and 12,997.50 is: 17,940.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,495.36 : 29,669.79 = 12,997.50 : x
  2. Step 2: Convert to fraction form
    21,495.36/29,669.79 = 12,997.50/x
  3. Step 3: Cross multiply
    21,495.36x = 29,669.79 × 12,997.50
  4. Step 4: Simplify right side
    21,495.36x = 385,633,095.53
  5. Step 5: Solve for x
    x = 385,633,095.53/21,495.36
  6. Step 6: Final answer
    x = 17,940.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.