Home / 21,431.82-29,556.18-14,705.58

Finding the Fourth Proportional to 21,431.82, 29,556.18 and 14,705.58

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Solution

The fourth proportional to 21,431.82, 29,556.18 and 14,705.58 is: 20,280.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.82 : 29,556.18 = 14,705.58 : x
  2. Step 2: Convert to fraction form
    21,431.82/29,556.18 = 14,705.58/x
  3. Step 3: Cross multiply
    21,431.82x = 29,556.18 × 14,705.58
  4. Step 4: Simplify right side
    21,431.82x = 434,640,769.48
  5. Step 5: Solve for x
    x = 434,640,769.48/21,431.82
  6. Step 6: Final answer
    x = 20,280.16

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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.