Home / 20,643.58-28,483.26-12,146.07

Finding the Fourth Proportional to 20,643.58, 28,483.26 and 12,146.07

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Solution

The fourth proportional to 20,643.58, 28,483.26 and 12,146.07 is: 16,758.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.58 : 28,483.26 = 12,146.07 : x
  2. Step 2: Convert to fraction form
    20,643.58/28,483.26 = 12,146.07/x
  3. Step 3: Cross multiply
    20,643.58x = 28,483.26 × 12,146.07
  4. Step 4: Simplify right side
    20,643.58x = 345,959,741.00
  5. Step 5: Solve for x
    x = 345,959,741.00/20,643.58
  6. Step 6: Final answer
    x = 16,758.71

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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.