Home / 21,636.28-29,858.10-12,076.90

Finding the Fourth Proportional to 21,636.28, 29,858.10 and 12,076.90

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Solution

The fourth proportional to 21,636.28, 29,858.10 and 12,076.90 is: 16,666.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,636.28 : 29,858.10 = 12,076.90 : x
  2. Step 2: Convert to fraction form
    21,636.28/29,858.10 = 12,076.90/x
  3. Step 3: Cross multiply
    21,636.28x = 29,858.10 × 12,076.90
  4. Step 4: Simplify right side
    21,636.28x = 360,593,287.89
  5. Step 5: Solve for x
    x = 360,593,287.89/21,636.28
  6. Step 6: Final answer
    x = 16,666.14

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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.