Home / 20,602.51-28,431.21-11,170.87

Finding the Fourth Proportional to 20,602.51, 28,431.21 and 11,170.87

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Solution

The fourth proportional to 20,602.51, 28,431.21 and 11,170.87 is: 15,415.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.51 : 28,431.21 = 11,170.87 : x
  2. Step 2: Convert to fraction form
    20,602.51/28,431.21 = 11,170.87/x
  3. Step 3: Cross multiply
    20,602.51x = 28,431.21 × 11,170.87
  4. Step 4: Simplify right side
    20,602.51x = 317,601,350.85
  5. Step 5: Solve for x
    x = 317,601,350.85/20,602.51
  6. Step 6: Final answer
    x = 15,415.66

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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.