Home / 19,618.58-29,418.66-7,129.80

Finding the Fourth Proportional to 19,618.58, 29,418.66 and 7,129.80

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Solution

The fourth proportional to 19,618.58, 29,418.66 and 7,129.80 is: 10,691.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,618.58 : 29,418.66 = 7,129.80 : x
  2. Step 2: Convert to fraction form
    19,618.58/29,418.66 = 7,129.80/x
  3. Step 3: Cross multiply
    19,618.58x = 29,418.66 × 7,129.80
  4. Step 4: Simplify right side
    19,618.58x = 209,749,162.07
  5. Step 5: Solve for x
    x = 209,749,162.07/19,618.58
  6. Step 6: Final answer
    x = 10,691.35

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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.