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Finding the Fourth Proportional to 20,605.01, 28,422.73 and 13,153.01

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Solution

The fourth proportional to 20,605.01, 28,422.73 and 13,153.01 is: 18,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.01 : 28,422.73 = 13,153.01 : x
  2. Step 2: Convert to fraction form
    20,605.01/28,422.73 = 13,153.01/x
  3. Step 3: Cross multiply
    20,605.01x = 28,422.73 × 13,153.01
  4. Step 4: Simplify right side
    20,605.01x = 373,844,555.86
  5. Step 5: Solve for x
    x = 373,844,555.86/20,605.01
  6. Step 6: Final answer
    x = 18,143.38

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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.