Home / 20,682.76-28,536.18-12,726.28

Finding the Fourth Proportional to 20,682.76, 28,536.18 and 12,726.28

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Solution

The fourth proportional to 20,682.76, 28,536.18 and 12,726.28 is: 17,558.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,682.76 : 28,536.18 = 12,726.28 : x
  2. Step 2: Convert to fraction form
    20,682.76/28,536.18 = 12,726.28/x
  3. Step 3: Cross multiply
    20,682.76x = 28,536.18 × 12,726.28
  4. Step 4: Simplify right side
    20,682.76x = 363,159,416.81
  5. Step 5: Solve for x
    x = 363,159,416.81/20,682.76
  6. Step 6: Final answer
    x = 17,558.56

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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.