Home / 21,281.04-29,366.69-11,720.61

Finding the Fourth Proportional to 21,281.04, 29,366.69 and 11,720.61

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Solution

The fourth proportional to 21,281.04, 29,366.69 and 11,720.61 is: 16,173.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.04 : 29,366.69 = 11,720.61 : x
  2. Step 2: Convert to fraction form
    21,281.04/29,366.69 = 11,720.61/x
  3. Step 3: Cross multiply
    21,281.04x = 29,366.69 × 11,720.61
  4. Step 4: Simplify right side
    21,281.04x = 344,195,461.88
  5. Step 5: Solve for x
    x = 344,195,461.88/21,281.04
  6. Step 6: Final answer
    x = 16,173.81

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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.