Home / 20,605.28-28,435.30-11,173.84

Finding the Fourth Proportional to 20,605.28, 28,435.30 and 11,173.84

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Solution

The fourth proportional to 20,605.28, 28,435.30 and 11,173.84 is: 15,419.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.28 : 28,435.30 = 11,173.84 : x
  2. Step 2: Convert to fraction form
    20,605.28/28,435.30 = 11,173.84/x
  3. Step 3: Cross multiply
    20,605.28x = 28,435.30 × 11,173.84
  4. Step 4: Simplify right side
    20,605.28x = 317,731,294.51
  5. Step 5: Solve for x
    x = 317,731,294.51/20,605.28
  6. Step 6: Final answer
    x = 15,419.90

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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.