Home / 13,668.70-18,862.90-7,699.80

Finding the Fourth Proportional to 13,668.70, 18,862.90 and 7,699.80

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Solution

The fourth proportional to 13,668.70, 18,862.90 and 7,699.80 is: 10,625.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.70 : 18,862.90 = 7,699.80 : x
  2. Step 2: Convert to fraction form
    13,668.70/18,862.90 = 7,699.80/x
  3. Step 3: Cross multiply
    13,668.70x = 18,862.90 × 7,699.80
  4. Step 4: Simplify right side
    13,668.70x = 145,240,557.42
  5. Step 5: Solve for x
    x = 145,240,557.42/13,668.70
  6. Step 6: Final answer
    x = 10,625.78

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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.