Home / 20,821.88-28,733.46-12,325.52

Finding the Fourth Proportional to 20,821.88, 28,733.46 and 12,325.52

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Solution

The fourth proportional to 20,821.88, 28,733.46 and 12,325.52 is: 17,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.88 : 28,733.46 = 12,325.52 : x
  2. Step 2: Convert to fraction form
    20,821.88/28,733.46 = 12,325.52/x
  3. Step 3: Cross multiply
    20,821.88x = 28,733.46 × 12,325.52
  4. Step 4: Simplify right side
    20,821.88x = 354,154,835.90
  5. Step 5: Solve for x
    x = 354,154,835.90/20,821.88
  6. Step 6: Final answer
    x = 17,008.78

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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.