Home / 20,305.68-28,020.54-11,353.92

Finding the Fourth Proportional to 20,305.68, 28,020.54 and 11,353.92

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Solution

The fourth proportional to 20,305.68, 28,020.54 and 11,353.92 is: 15,667.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.68 : 28,020.54 = 11,353.92 : x
  2. Step 2: Convert to fraction form
    20,305.68/28,020.54 = 11,353.92/x
  3. Step 3: Cross multiply
    20,305.68x = 28,020.54 × 11,353.92
  4. Step 4: Simplify right side
    20,305.68x = 318,142,969.52
  5. Step 5: Solve for x
    x = 318,142,969.52/20,305.68
  6. Step 6: Final answer
    x = 15,667.68

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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.