Home / 21,310.76-29,411.70-11,880.20

Finding the Fourth Proportional to 21,310.76, 29,411.70 and 11,880.20

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Solution

The fourth proportional to 21,310.76, 29,411.70 and 11,880.20 is: 16,396.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.76 : 29,411.70 = 11,880.20 : x
  2. Step 2: Convert to fraction form
    21,310.76/29,411.70 = 11,880.20/x
  3. Step 3: Cross multiply
    21,310.76x = 29,411.70 × 11,880.20
  4. Step 4: Simplify right side
    21,310.76x = 349,416,878.34
  5. Step 5: Solve for x
    x = 349,416,878.34/21,310.76
  6. Step 6: Final answer
    x = 16,396.27

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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.