Home / 20,784.36-28,682.46-12,824.76

Finding the Fourth Proportional to 20,784.36, 28,682.46 and 12,824.76

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Solution

The fourth proportional to 20,784.36, 28,682.46 and 12,824.76 is: 17,698.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.36 : 28,682.46 = 12,824.76 : x
  2. Step 2: Convert to fraction form
    20,784.36/28,682.46 = 12,824.76/x
  3. Step 3: Cross multiply
    20,784.36x = 28,682.46 × 12,824.76
  4. Step 4: Simplify right side
    20,784.36x = 367,845,665.71
  5. Step 5: Solve for x
    x = 367,845,665.71/20,784.36
  6. Step 6: Final answer
    x = 17,698.20

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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.