Home / 18,922.50-28,387.80-6,443.64

Finding the Fourth Proportional to 18,922.50, 28,387.80 and 6,443.64

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Solution

The fourth proportional to 18,922.50, 28,387.80 and 6,443.64 is: 9,666.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.50 : 28,387.80 = 6,443.64 : x
  2. Step 2: Convert to fraction form
    18,922.50/28,387.80 = 6,443.64/x
  3. Step 3: Cross multiply
    18,922.50x = 28,387.80 × 6,443.64
  4. Step 4: Simplify right side
    18,922.50x = 182,920,763.59
  5. Step 5: Solve for x
    x = 182,920,763.59/18,922.50
  6. Step 6: Final answer
    x = 9,666.84

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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.