Home / 20,536.16-28,344.32-12,977.69

Finding the Fourth Proportional to 20,536.16, 28,344.32 and 12,977.69

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Solution

The fourth proportional to 20,536.16, 28,344.32 and 12,977.69 is: 17,912.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,536.16 : 28,344.32 = 12,977.69 : x
  2. Step 2: Convert to fraction form
    20,536.16/28,344.32 = 12,977.69/x
  3. Step 3: Cross multiply
    20,536.16x = 28,344.32 × 12,977.69
  4. Step 4: Simplify right side
    20,536.16x = 367,843,830.67
  5. Step 5: Solve for x
    x = 367,843,830.67/20,536.16
  6. Step 6: Final answer
    x = 17,912.01

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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.