Home / 20,383.02-28,128.69-11,890.08

Finding the Fourth Proportional to 20,383.02, 28,128.69 and 11,890.08

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Solution

The fourth proportional to 20,383.02, 28,128.69 and 11,890.08 is: 16,408.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.02 : 28,128.69 = 11,890.08 : x
  2. Step 2: Convert to fraction form
    20,383.02/28,128.69 = 11,890.08/x
  3. Step 3: Cross multiply
    20,383.02x = 28,128.69 × 11,890.08
  4. Step 4: Simplify right side
    20,383.02x = 334,452,374.40
  5. Step 5: Solve for x
    x = 334,452,374.40/20,383.02
  6. Step 6: Final answer
    x = 16,408.38

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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.