Home / 21,489.39-29,655.59-12,057.75

Finding the Fourth Proportional to 21,489.39, 29,655.59 and 12,057.75

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Solution

The fourth proportional to 21,489.39, 29,655.59 and 12,057.75 is: 16,639.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.39 : 29,655.59 = 12,057.75 : x
  2. Step 2: Convert to fraction form
    21,489.39/29,655.59 = 12,057.75/x
  3. Step 3: Cross multiply
    21,489.39x = 29,655.59 × 12,057.75
  4. Step 4: Simplify right side
    21,489.39x = 357,579,630.03
  5. Step 5: Solve for x
    x = 357,579,630.03/21,489.39
  6. Step 6: Final answer
    x = 16,639.82

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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.