Home / 20,708.40-28,588.20-14,029.20

Finding the Fourth Proportional to 20,708.40, 28,588.20 and 14,029.20

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Solution

The fourth proportional to 20,708.40, 28,588.20 and 14,029.20 is: 19,367.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.40 : 28,588.20 = 14,029.20 : x
  2. Step 2: Convert to fraction form
    20,708.40/28,588.20 = 14,029.20/x
  3. Step 3: Cross multiply
    20,708.40x = 28,588.20 × 14,029.20
  4. Step 4: Simplify right side
    20,708.40x = 401,069,575.44
  5. Step 5: Solve for x
    x = 401,069,575.44/20,708.40
  6. Step 6: Final answer
    x = 19,367.48

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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.