Home / 12,985.26-17,919.66-7,680.43

Finding the Fourth Proportional to 12,985.26, 17,919.66 and 7,680.43

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Solution

The fourth proportional to 12,985.26, 17,919.66 and 7,680.43 is: 10,598.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.26 : 17,919.66 = 7,680.43 : x
  2. Step 2: Convert to fraction form
    12,985.26/17,919.66 = 7,680.43/x
  3. Step 3: Cross multiply
    12,985.26x = 17,919.66 × 7,680.43
  4. Step 4: Simplify right side
    12,985.26x = 137,630,694.25
  5. Step 5: Solve for x
    x = 137,630,694.25/12,985.26
  6. Step 6: Final answer
    x = 10,598.99

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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.