Home / 20,605.03-28,434.95-11,173.59

Finding the Fourth Proportional to 20,605.03, 28,434.95 and 11,173.59

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Solution

The fourth proportional to 20,605.03, 28,434.95 and 11,173.59 is: 15,419.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.03 : 28,434.95 = 11,173.59 : x
  2. Step 2: Convert to fraction form
    20,605.03/28,434.95 = 11,173.59/x
  3. Step 3: Cross multiply
    20,605.03x = 28,434.95 × 11,173.59
  4. Step 4: Simplify right side
    20,605.03x = 317,720,500.90
  5. Step 5: Solve for x
    x = 317,720,500.90/20,605.03
  6. Step 6: Final answer
    x = 15,419.56

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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.