Home / 21,487.78-29,654.91-11,928.26

Finding the Fourth Proportional to 21,487.78, 29,654.91 and 11,928.26

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Solution

The fourth proportional to 21,487.78, 29,654.91 and 11,928.26 is: 16,461.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,487.78 : 29,654.91 = 11,928.26 : x
  2. Step 2: Convert to fraction form
    21,487.78/29,654.91 = 11,928.26/x
  3. Step 3: Cross multiply
    21,487.78x = 29,654.91 × 11,928.26
  4. Step 4: Simplify right side
    21,487.78x = 353,731,550.89
  5. Step 5: Solve for x
    x = 353,731,550.89/21,487.78
  6. Step 6: Final answer
    x = 16,461.99

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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.