Home / 12,890.94-17,789.46-7,225.70

Finding the Fourth Proportional to 12,890.94, 17,789.46 and 7,225.70

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Solution

The fourth proportional to 12,890.94, 17,789.46 and 7,225.70 is: 9,971.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,890.94 : 17,789.46 = 7,225.70 : x
  2. Step 2: Convert to fraction form
    12,890.94/17,789.46 = 7,225.70/x
  3. Step 3: Cross multiply
    12,890.94x = 17,789.46 × 7,225.70
  4. Step 4: Simplify right side
    12,890.94x = 128,541,264.99
  5. Step 5: Solve for x
    x = 128,541,264.99/12,890.94
  6. Step 6: Final answer
    x = 9,971.44

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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.