Home / 21,290.61-29,381.36-12,217.45

Finding the Fourth Proportional to 21,290.61, 29,381.36 and 12,217.45

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Solution

The fourth proportional to 21,290.61, 29,381.36 and 12,217.45 is: 16,860.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.61 : 29,381.36 = 12,217.45 : x
  2. Step 2: Convert to fraction form
    21,290.61/29,381.36 = 12,217.45/x
  3. Step 3: Cross multiply
    21,290.61x = 29,381.36 × 12,217.45
  4. Step 4: Simplify right side
    21,290.61x = 358,965,296.73
  5. Step 5: Solve for x
    x = 358,965,296.73/21,290.61
  6. Step 6: Final answer
    x = 16,860.26

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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.