Home / 14,255.42-21,387.45-6,857.78

Finding the Fourth Proportional to 14,255.42, 21,387.45 and 6,857.78

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Solution

The fourth proportional to 14,255.42, 21,387.45 and 6,857.78 is: 10,288.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,255.42 : 21,387.45 = 6,857.78 : x
  2. Step 2: Convert to fraction form
    14,255.42/21,387.45 = 6,857.78/x
  3. Step 3: Cross multiply
    14,255.42x = 21,387.45 × 6,857.78
  4. Step 4: Simplify right side
    14,255.42x = 146,670,426.86
  5. Step 5: Solve for x
    x = 146,670,426.86/14,255.42
  6. Step 6: Final answer
    x = 10,288.75

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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.