Home / 28,958.05-39,966.65-20,997.37

Finding the Fourth Proportional to 28,958.05, 39,966.65 and 20,997.37

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Solution

The fourth proportional to 28,958.05, 39,966.65 and 20,997.37 is: 28,979.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,958.05 : 39,966.65 = 20,997.37 : x
  2. Step 2: Convert to fraction form
    28,958.05/39,966.65 = 20,997.37/x
  3. Step 3: Cross multiply
    28,958.05x = 39,966.65 × 20,997.37
  4. Step 4: Simplify right side
    28,958.05x = 839,194,537.71
  5. Step 5: Solve for x
    x = 839,194,537.71/28,958.05
  6. Step 6: Final answer
    x = 28,979.66

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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.