Home / 20,407.87-28,161.30-11,453.64

Finding the Fourth Proportional to 20,407.87, 28,161.30 and 11,453.64

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Solution

The fourth proportional to 20,407.87, 28,161.30 and 11,453.64 is: 15,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.87 : 28,161.30 = 11,453.64 : x
  2. Step 2: Convert to fraction form
    20,407.87/28,161.30 = 11,453.64/x
  3. Step 3: Cross multiply
    20,407.87x = 28,161.30 × 11,453.64
  4. Step 4: Simplify right side
    20,407.87x = 322,549,476.99
  5. Step 5: Solve for x
    x = 322,549,476.99/20,407.87
  6. Step 6: Final answer
    x = 15,805.15

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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.