Home / 20,937.68-28,896.72-11,986.64

Finding the Fourth Proportional to 20,937.68, 28,896.72 and 11,986.64

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Solution

The fourth proportional to 20,937.68, 28,896.72 and 11,986.64 is: 16,543.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.68 : 28,896.72 = 11,986.64 : x
  2. Step 2: Convert to fraction form
    20,937.68/28,896.72 = 11,986.64/x
  3. Step 3: Cross multiply
    20,937.68x = 28,896.72 × 11,986.64
  4. Step 4: Simplify right side
    20,937.68x = 346,374,579.82
  5. Step 5: Solve for x
    x = 346,374,579.82/20,937.68
  6. Step 6: Final answer
    x = 16,543.12

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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.