Home / 20,942.08-28,900.60-11,510.88

Finding the Fourth Proportional to 20,942.08, 28,900.60 and 11,510.88

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Solution

The fourth proportional to 20,942.08, 28,900.60 and 11,510.88 is: 15,885.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.08 : 28,900.60 = 11,510.88 : x
  2. Step 2: Convert to fraction form
    20,942.08/28,900.60 = 11,510.88/x
  3. Step 3: Cross multiply
    20,942.08x = 28,900.60 × 11,510.88
  4. Step 4: Simplify right side
    20,942.08x = 332,671,338.53
  5. Step 5: Solve for x
    x = 332,671,338.53/20,942.08
  6. Step 6: Final answer
    x = 15,885.31

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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.