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Finding the Fourth Proportional to 21,495, 29,663.40 and 11,805.25

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Solution

The fourth proportional to 21,495, 29,663.40 and 11,805.25 is: 16,291.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,495 : 29,663.40 = 11,805.25 : x
  2. Step 2: Convert to fraction form
    21,495/29,663.40 = 11,805.25/x
  3. Step 3: Cross multiply
    21,495x = 29,663.40 × 11,805.25
  4. Step 4: Simplify right side
    21,495x = 350,183,852.85
  5. Step 5: Solve for x
    x = 350,183,852.85/21,495
  6. Step 6: Final answer
    x = 16,291.41

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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.