Home / 20,605.02-28,434.78-11,173.56

Finding the Fourth Proportional to 20,605.02, 28,434.78 and 11,173.56

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Solution

The fourth proportional to 20,605.02, 28,434.78 and 11,173.56 is: 15,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.02 : 28,434.78 = 11,173.56 : x
  2. Step 2: Convert to fraction form
    20,605.02/28,434.78 = 11,173.56/x
  3. Step 3: Cross multiply
    20,605.02x = 28,434.78 × 11,173.56
  4. Step 4: Simplify right side
    20,605.02x = 317,717,720.42
  5. Step 5: Solve for x
    x = 317,717,720.42/20,605.02
  6. Step 6: Final answer
    x = 15,419.43

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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.