Home / 20,818.07-28,729.97-12,325.05

Finding the Fourth Proportional to 20,818.07, 28,729.97 and 12,325.05

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Solution

The fourth proportional to 20,818.07, 28,729.97 and 12,325.05 is: 17,009.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.07 : 28,729.97 = 12,325.05 : x
  2. Step 2: Convert to fraction form
    20,818.07/28,729.97 = 12,325.05/x
  3. Step 3: Cross multiply
    20,818.07x = 28,729.97 × 12,325.05
  4. Step 4: Simplify right side
    20,818.07x = 354,098,255.12
  5. Step 5: Solve for x
    x = 354,098,255.12/20,818.07
  6. Step 6: Final answer
    x = 17,009.18

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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.