Home / 21,259.64-29,334.99-12,305.39

Finding the Fourth Proportional to 21,259.64, 29,334.99 and 12,305.39

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Solution

The fourth proportional to 21,259.64, 29,334.99 and 12,305.39 is: 16,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.64 : 29,334.99 = 12,305.39 : x
  2. Step 2: Convert to fraction form
    21,259.64/29,334.99 = 12,305.39/x
  3. Step 3: Cross multiply
    21,259.64x = 29,334.99 × 12,305.39
  4. Step 4: Simplify right side
    21,259.64x = 360,978,492.60
  5. Step 5: Solve for x
    x = 360,978,492.60/21,259.64
  6. Step 6: Final answer
    x = 16,979.52

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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.