Home / 20,383.56-28,129.61-11,885.45

Finding the Fourth Proportional to 20,383.56, 28,129.61 and 11,885.45

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Solution

The fourth proportional to 20,383.56, 28,129.61 and 11,885.45 is: 16,402.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.56 : 28,129.61 = 11,885.45 : x
  2. Step 2: Convert to fraction form
    20,383.56/28,129.61 = 11,885.45/x
  3. Step 3: Cross multiply
    20,383.56x = 28,129.61 × 11,885.45
  4. Step 4: Simplify right side
    20,383.56x = 334,333,073.17
  5. Step 5: Solve for x
    x = 334,333,073.17/20,383.56
  6. Step 6: Final answer
    x = 16,402.09

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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.