Home / 21,231.94-29,280.09-13,670.98

Finding the Fourth Proportional to 21,231.94, 29,280.09 and 13,670.98

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Solution

The fourth proportional to 21,231.94, 29,280.09 and 13,670.98 is: 18,853.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.94 : 29,280.09 = 13,670.98 : x
  2. Step 2: Convert to fraction form
    21,231.94/29,280.09 = 13,670.98/x
  3. Step 3: Cross multiply
    21,231.94x = 29,280.09 × 13,670.98
  4. Step 4: Simplify right side
    21,231.94x = 400,287,524.79
  5. Step 5: Solve for x
    x = 400,287,524.79/21,231.94
  6. Step 6: Final answer
    x = 18,853.08

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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.