Home / 21,291.61-29,382.75-12,218.44

Finding the Fourth Proportional to 21,291.61, 29,382.75 and 12,218.44

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Solution

The fourth proportional to 21,291.61, 29,382.75 and 12,218.44 is: 16,861.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.61 : 29,382.75 = 12,218.44 : x
  2. Step 2: Convert to fraction form
    21,291.61/29,382.75 = 12,218.44/x
  3. Step 3: Cross multiply
    21,291.61x = 29,382.75 × 12,218.44
  4. Step 4: Simplify right side
    21,291.61x = 359,011,367.91
  5. Step 5: Solve for x
    x = 359,011,367.91/21,291.61
  6. Step 6: Final answer
    x = 16,861.64

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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.