Home / 20,703.87-28,559.94-13,145.07

Finding the Fourth Proportional to 20,703.87, 28,559.94 and 13,145.07

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Solution

The fourth proportional to 20,703.87, 28,559.94 and 13,145.07 is: 18,132.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.87 : 28,559.94 = 13,145.07 : x
  2. Step 2: Convert to fraction form
    20,703.87/28,559.94 = 13,145.07/x
  3. Step 3: Cross multiply
    20,703.87x = 28,559.94 × 13,145.07
  4. Step 4: Simplify right side
    20,703.87x = 375,422,410.50
  5. Step 5: Solve for x
    x = 375,422,410.50/20,703.87
  6. Step 6: Final answer
    x = 18,132.96

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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.