Home / 20,429.55-28,195.40-11,477.05

Finding the Fourth Proportional to 20,429.55, 28,195.40 and 11,477.05

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Solution

The fourth proportional to 20,429.55, 28,195.40 and 11,477.05 is: 15,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.55 : 28,195.40 = 11,477.05 : x
  2. Step 2: Convert to fraction form
    20,429.55/28,195.40 = 11,477.05/x
  3. Step 3: Cross multiply
    20,429.55x = 28,195.40 × 11,477.05
  4. Step 4: Simplify right side
    20,429.55x = 323,600,015.57
  5. Step 5: Solve for x
    x = 323,600,015.57/20,429.55
  6. Step 6: Final answer
    x = 15,839.80

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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.