Home / 20,818.32-31,029.55-19,636.05

Finding the Fourth Proportional to 20,818.32, 31,029.55 and 19,636.05

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Solution

The fourth proportional to 20,818.32, 31,029.55 and 19,636.05 is: 29,267.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.32 : 31,029.55 = 19,636.05 : x
  2. Step 2: Convert to fraction form
    20,818.32/31,029.55 = 19,636.05/x
  3. Step 3: Cross multiply
    20,818.32x = 31,029.55 × 19,636.05
  4. Step 4: Simplify right side
    20,818.32x = 609,297,862.55
  5. Step 5: Solve for x
    x = 609,297,862.55/20,818.32
  6. Step 6: Final answer
    x = 29,267.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.