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Finding the Fourth Proportional to 20,995.88, 28,973.38 and 12,036.96

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Solution

The fourth proportional to 20,995.88, 28,973.38 and 12,036.96 is: 16,610.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.88 : 28,973.38 = 12,036.96 : x
  2. Step 2: Convert to fraction form
    20,995.88/28,973.38 = 12,036.96/x
  3. Step 3: Cross multiply
    20,995.88x = 28,973.38 × 12,036.96
  4. Step 4: Simplify right side
    20,995.88x = 348,751,416.12
  5. Step 5: Solve for x
    x = 348,751,416.12/20,995.88
  6. Step 6: Final answer
    x = 16,610.47

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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.