Home / 20,964.81-28,931.66-12,012.12

Finding the Fourth Proportional to 20,964.81, 28,931.66 and 12,012.12

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Solution

The fourth proportional to 20,964.81, 28,931.66 and 12,012.12 is: 16,576.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.81 : 28,931.66 = 12,012.12 : x
  2. Step 2: Convert to fraction form
    20,964.81/28,931.66 = 12,012.12/x
  3. Step 3: Cross multiply
    20,964.81x = 28,931.66 × 12,012.12
  4. Step 4: Simplify right side
    20,964.81x = 347,530,511.66
  5. Step 5: Solve for x
    x = 347,530,511.66/20,964.81
  6. Step 6: Final answer
    x = 16,576.85

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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.