Home / 20,938.94-28,895.40-11,507.30

Finding the Fourth Proportional to 20,938.94, 28,895.40 and 11,507.30

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Solution

The fourth proportional to 20,938.94, 28,895.40 and 11,507.30 is: 15,879.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.94 : 28,895.40 = 11,507.30 : x
  2. Step 2: Convert to fraction form
    20,938.94/28,895.40 = 11,507.30/x
  3. Step 3: Cross multiply
    20,938.94x = 28,895.40 × 11,507.30
  4. Step 4: Simplify right side
    20,938.94x = 332,508,036.42
  5. Step 5: Solve for x
    x = 332,508,036.42/20,938.94
  6. Step 6: Final answer
    x = 15,879.89

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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.