Home / 21,220.35-29,284.64-12,723.86

Finding the Fourth Proportional to 21,220.35, 29,284.64 and 12,723.86

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Solution

The fourth proportional to 21,220.35, 29,284.64 and 12,723.86 is: 17,559.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.35 : 29,284.64 = 12,723.86 : x
  2. Step 2: Convert to fraction form
    21,220.35/29,284.64 = 12,723.86/x
  3. Step 3: Cross multiply
    21,220.35x = 29,284.64 × 12,723.86
  4. Step 4: Simplify right side
    21,220.35x = 372,613,449.47
  5. Step 5: Solve for x
    x = 372,613,449.47/21,220.35
  6. Step 6: Final answer
    x = 17,559.25

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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.