Home / 20,679.74-28,538.64-12,726.62

Finding the Fourth Proportional to 20,679.74, 28,538.64 and 12,726.62

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Solution

The fourth proportional to 20,679.74, 28,538.64 and 12,726.62 is: 17,563.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.74 : 28,538.64 = 12,726.62 : x
  2. Step 2: Convert to fraction form
    20,679.74/28,538.64 = 12,726.62/x
  3. Step 3: Cross multiply
    20,679.74x = 28,538.64 × 12,726.62
  4. Step 4: Simplify right side
    20,679.74x = 363,200,426.60
  5. Step 5: Solve for x
    x = 363,200,426.60/20,679.74
  6. Step 6: Final answer
    x = 17,563.10

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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.