Home / 12,889.20-17,795.67-9,899.69

Finding the Fourth Proportional to 12,889.20, 17,795.67 and 9,899.69

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Solution

The fourth proportional to 12,889.20, 17,795.67 and 9,899.69 is: 13,668.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.20 : 17,795.67 = 9,899.69 : x
  2. Step 2: Convert to fraction form
    12,889.20/17,795.67 = 9,899.69/x
  3. Step 3: Cross multiply
    12,889.20x = 17,795.67 × 9,899.69
  4. Step 4: Simplify right side
    12,889.20x = 176,171,566.84
  5. Step 5: Solve for x
    x = 176,171,566.84/12,889.20
  6. Step 6: Final answer
    x = 13,668.15

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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.