Home / 15,451.90-21,326.28-8,739.61

Finding the Fourth Proportional to 15,451.90, 21,326.28 and 8,739.61

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Solution

The fourth proportional to 15,451.90, 21,326.28 and 8,739.61 is: 12,062.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,451.90 : 21,326.28 = 8,739.61 : x
  2. Step 2: Convert to fraction form
    15,451.90/21,326.28 = 8,739.61/x
  3. Step 3: Cross multiply
    15,451.90x = 21,326.28 × 8,739.61
  4. Step 4: Simplify right side
    15,451.90x = 186,383,369.95
  5. Step 5: Solve for x
    x = 186,383,369.95/15,451.90
  6. Step 6: Final answer
    x = 12,062.17

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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.