Home / 20,429.10-28,190.43-11,475.90

Finding the Fourth Proportional to 20,429.10, 28,190.43 and 11,475.90

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Solution

The fourth proportional to 20,429.10, 28,190.43 and 11,475.90 is: 15,835.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.10 : 28,190.43 = 11,475.90 : x
  2. Step 2: Convert to fraction form
    20,429.10/28,190.43 = 11,475.90/x
  3. Step 3: Cross multiply
    20,429.10x = 28,190.43 × 11,475.90
  4. Step 4: Simplify right side
    20,429.10x = 323,510,555.64
  5. Step 5: Solve for x
    x = 323,510,555.64/20,429.10
  6. Step 6: Final answer
    x = 15,835.77

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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.