Home / 20,602.12-28,430.67-11,170.66

Finding the Fourth Proportional to 20,602.12, 28,430.67 and 11,170.66

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Solution

The fourth proportional to 20,602.12, 28,430.67 and 11,170.66 is: 15,415.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.12 : 28,430.67 = 11,170.66 : x
  2. Step 2: Convert to fraction form
    20,602.12/28,430.67 = 11,170.66/x
  3. Step 3: Cross multiply
    20,602.12x = 28,430.67 × 11,170.66
  4. Step 4: Simplify right side
    20,602.12x = 317,589,348.14
  5. Step 5: Solve for x
    x = 317,589,348.14/20,602.12
  6. Step 6: Final answer
    x = 15,415.37

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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.