Home / 20,383.80-28,130.76-11,434.14

Finding the Fourth Proportional to 20,383.80, 28,130.76 and 11,434.14

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Solution

The fourth proportional to 20,383.80, 28,130.76 and 11,434.14 is: 15,779.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.80 : 28,130.76 = 11,434.14 : x
  2. Step 2: Convert to fraction form
    20,383.80/28,130.76 = 11,434.14/x
  3. Step 3: Cross multiply
    20,383.80x = 28,130.76 × 11,434.14
  4. Step 4: Simplify right side
    20,383.80x = 321,651,048.15
  5. Step 5: Solve for x
    x = 321,651,048.15/20,383.80
  6. Step 6: Final answer
    x = 15,779.74

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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.