Home / 18,921.71-28,249.52-14,455.98

Finding the Fourth Proportional to 18,921.71, 28,249.52 and 14,455.98

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Solution

The fourth proportional to 18,921.71, 28,249.52 and 14,455.98 is: 21,582.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.71 : 28,249.52 = 14,455.98 : x
  2. Step 2: Convert to fraction form
    18,921.71/28,249.52 = 14,455.98/x
  3. Step 3: Cross multiply
    18,921.71x = 28,249.52 × 14,455.98
  4. Step 4: Simplify right side
    18,921.71x = 408,374,423.85
  5. Step 5: Solve for x
    x = 408,374,423.85/18,921.71
  6. Step 6: Final answer
    x = 21,582.32

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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.