Home / 18,927.95-28,393.68-6,443.78

Finding the Fourth Proportional to 18,927.95, 28,393.68 and 6,443.78

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Solution

The fourth proportional to 18,927.95, 28,393.68 and 6,443.78 is: 9,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.95 : 28,393.68 = 6,443.78 : x
  2. Step 2: Convert to fraction form
    18,927.95/28,393.68 = 6,443.78/x
  3. Step 3: Cross multiply
    18,927.95x = 28,393.68 × 6,443.78
  4. Step 4: Simplify right side
    18,927.95x = 182,962,627.31
  5. Step 5: Solve for x
    x = 182,962,627.31/18,927.95
  6. Step 6: Final answer
    x = 9,666.27

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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.