Home / 20,938.57-28,895.50-11,507.06

Finding the Fourth Proportional to 20,938.57, 28,895.50 and 11,507.06

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Solution

The fourth proportional to 20,938.57, 28,895.50 and 11,507.06 is: 15,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.57 : 28,895.50 = 11,507.06 : x
  2. Step 2: Convert to fraction form
    20,938.57/28,895.50 = 11,507.06/x
  3. Step 3: Cross multiply
    20,938.57x = 28,895.50 × 11,507.06
  4. Step 4: Simplify right side
    20,938.57x = 332,502,338.85
  5. Step 5: Solve for x
    x = 332,502,338.85/20,938.57
  6. Step 6: Final answer
    x = 15,879.90

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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.