Home / 20,383.55-28,127.35-11,429

Finding the Fourth Proportional to 20,383.55, 28,127.35 and 11,429

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Solution

The fourth proportional to 20,383.55, 28,127.35 and 11,429 is: 15,770.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.55 : 28,127.35 = 11,429 : x
  2. Step 2: Convert to fraction form
    20,383.55/28,127.35 = 11,429/x
  3. Step 3: Cross multiply
    20,383.55x = 28,127.35 × 11,429
  4. Step 4: Simplify right side
    20,383.55x = 321,467,483.15
  5. Step 5: Solve for x
    x = 321,467,483.15/20,383.55
  6. Step 6: Final answer
    x = 15,770.93

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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.