Home / 21,613.63-29,829.51-12,664.54

Finding the Fourth Proportional to 21,613.63, 29,829.51 and 12,664.54

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Solution

The fourth proportional to 21,613.63, 29,829.51 and 12,664.54 is: 17,478.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.63 : 29,829.51 = 12,664.54 : x
  2. Step 2: Convert to fraction form
    21,613.63/29,829.51 = 12,664.54/x
  3. Step 3: Cross multiply
    21,613.63x = 29,829.51 × 12,664.54
  4. Step 4: Simplify right side
    21,613.63x = 377,777,022.58
  5. Step 5: Solve for x
    x = 377,777,022.58/21,613.63
  6. Step 6: Final answer
    x = 17,478.65

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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.