Home / 12,479.57-17,221.55-6,814.50

Finding the Fourth Proportional to 12,479.57, 17,221.55 and 6,814.50

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Solution

The fourth proportional to 12,479.57, 17,221.55 and 6,814.50 is: 9,403.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.57 : 17,221.55 = 6,814.50 : x
  2. Step 2: Convert to fraction form
    12,479.57/17,221.55 = 6,814.50/x
  3. Step 3: Cross multiply
    12,479.57x = 17,221.55 × 6,814.50
  4. Step 4: Simplify right side
    12,479.57x = 117,356,153.82
  5. Step 5: Solve for x
    x = 117,356,153.82/12,479.57
  6. Step 6: Final answer
    x = 9,403.86

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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.