Home / 12,620.40-18,929.92-3,854.63

Finding the Fourth Proportional to 12,620.40, 18,929.92 and 3,854.63

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Solution

The fourth proportional to 12,620.40, 18,929.92 and 3,854.63 is: 5,781.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.40 : 18,929.92 = 3,854.63 : x
  2. Step 2: Convert to fraction form
    12,620.40/18,929.92 = 3,854.63/x
  3. Step 3: Cross multiply
    12,620.40x = 18,929.92 × 3,854.63
  4. Step 4: Simplify right side
    12,620.40x = 72,967,818.26
  5. Step 5: Solve for x
    x = 72,967,818.26/12,620.40
  6. Step 6: Final answer
    x = 5,781.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.