Home / 20,953.13-28,912.89-12,000.10

Finding the Fourth Proportional to 20,953.13, 28,912.89 and 12,000.10

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Solution

The fourth proportional to 20,953.13, 28,912.89 and 12,000.10 is: 16,558.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.13 : 28,912.89 = 12,000.10 : x
  2. Step 2: Convert to fraction form
    20,953.13/28,912.89 = 12,000.10/x
  3. Step 3: Cross multiply
    20,953.13x = 28,912.89 × 12,000.10
  4. Step 4: Simplify right side
    20,953.13x = 346,957,544.01
  5. Step 5: Solve for x
    x = 346,957,544.01/20,953.13
  6. Step 6: Final answer
    x = 16,558.75

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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.