Home / 21,613.60-29,829.72-12,664.68

Finding the Fourth Proportional to 21,613.60, 29,829.72 and 12,664.68

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Solution

The fourth proportional to 21,613.60, 29,829.72 and 12,664.68 is: 17,478.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.60 : 29,829.72 = 12,664.68 : x
  2. Step 2: Convert to fraction form
    21,613.60/29,829.72 = 12,664.68/x
  3. Step 3: Cross multiply
    21,613.60x = 29,829.72 × 12,664.68
  4. Step 4: Simplify right side
    21,613.60x = 377,783,858.29
  5. Step 5: Solve for x
    x = 377,783,858.29/21,613.60
  6. Step 6: Final answer
    x = 17,478.99

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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.