Home / 20,965.81-28,933.04-12,013.12

Finding the Fourth Proportional to 20,965.81, 28,933.04 and 12,013.12

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Solution

The fourth proportional to 20,965.81, 28,933.04 and 12,013.12 is: 16,578.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.81 : 28,933.04 = 12,013.12 : x
  2. Step 2: Convert to fraction form
    20,965.81/28,933.04 = 12,013.12/x
  3. Step 3: Cross multiply
    20,965.81x = 28,933.04 × 12,013.12
  4. Step 4: Simplify right side
    20,965.81x = 347,576,081.48
  5. Step 5: Solve for x
    x = 347,576,081.48/20,965.81
  6. Step 6: Final answer
    x = 16,578.23

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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.