Home / 21,284.20-29,372.76-12,783.44

Finding the Fourth Proportional to 21,284.20, 29,372.76 and 12,783.44

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Solution

The fourth proportional to 21,284.20, 29,372.76 and 12,783.44 is: 17,641.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,284.20 : 29,372.76 = 12,783.44 : x
  2. Step 2: Convert to fraction form
    21,284.20/29,372.76 = 12,783.44/x
  3. Step 3: Cross multiply
    21,284.20x = 29,372.76 × 12,783.44
  4. Step 4: Simplify right side
    21,284.20x = 375,484,915.09
  5. Step 5: Solve for x
    x = 375,484,915.09/21,284.20
  6. Step 6: Final answer
    x = 17,641.49

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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.