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Finding the Fourth Proportional to 12,989.91, 17,925 and 7,326.06

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Solution

The fourth proportional to 12,989.91, 17,925 and 7,326.06 is: 10,109.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.91 : 17,925 = 7,326.06 : x
  2. Step 2: Convert to fraction form
    12,989.91/17,925 = 7,326.06/x
  3. Step 3: Cross multiply
    12,989.91x = 17,925 × 7,326.06
  4. Step 4: Simplify right side
    12,989.91x = 131,319,625.50
  5. Step 5: Solve for x
    x = 131,319,625.50/12,989.91
  6. Step 6: Final answer
    x = 10,109.36

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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.