Home / 20,454.51-28,226.74-13,380.78

Finding the Fourth Proportional to 20,454.51, 28,226.74 and 13,380.78

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Solution

The fourth proportional to 20,454.51, 28,226.74 and 13,380.78 is: 18,465.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.51 : 28,226.74 = 13,380.78 : x
  2. Step 2: Convert to fraction form
    20,454.51/28,226.74 = 13,380.78/x
  3. Step 3: Cross multiply
    20,454.51x = 28,226.74 × 13,380.78
  4. Step 4: Simplify right side
    20,454.51x = 377,695,798.06
  5. Step 5: Solve for x
    x = 377,695,798.06/20,454.51
  6. Step 6: Final answer
    x = 18,465.16

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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.