Home / 20,678.45-28,535.44-11,247.02

Finding the Fourth Proportional to 20,678.45, 28,535.44 and 11,247.02

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Solution

The fourth proportional to 20,678.45, 28,535.44 and 11,247.02 is: 15,520.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.45 : 28,535.44 = 11,247.02 : x
  2. Step 2: Convert to fraction form
    20,678.45/28,535.44 = 11,247.02/x
  3. Step 3: Cross multiply
    20,678.45x = 28,535.44 × 11,247.02
  4. Step 4: Simplify right side
    20,678.45x = 320,938,465.48
  5. Step 5: Solve for x
    x = 320,938,465.48/20,678.45
  6. Step 6: Final answer
    x = 15,520.43

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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.