Home / 28,997.12-40,015.80-16,421.88

Finding the Fourth Proportional to 28,997.12, 40,015.80 and 16,421.88

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Solution

The fourth proportional to 28,997.12, 40,015.80 and 16,421.88 is: 22,662.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,997.12 : 40,015.80 = 16,421.88 : x
  2. Step 2: Convert to fraction form
    28,997.12/40,015.80 = 16,421.88/x
  3. Step 3: Cross multiply
    28,997.12x = 40,015.80 × 16,421.88
  4. Step 4: Simplify right side
    28,997.12x = 657,134,665.70
  5. Step 5: Solve for x
    x = 657,134,665.70/28,997.12
  6. Step 6: Final answer
    x = 22,662.07

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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.