Home / 21,115.48-29,140.68-12,164.26

Finding the Fourth Proportional to 21,115.48, 29,140.68 and 12,164.26

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Solution

The fourth proportional to 21,115.48, 29,140.68 and 12,164.26 is: 16,787.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.48 : 29,140.68 = 12,164.26 : x
  2. Step 2: Convert to fraction form
    21,115.48/29,140.68 = 12,164.26/x
  3. Step 3: Cross multiply
    21,115.48x = 29,140.68 × 12,164.26
  4. Step 4: Simplify right side
    21,115.48x = 354,474,808.10
  5. Step 5: Solve for x
    x = 354,474,808.10/21,115.48
  6. Step 6: Final answer
    x = 16,787.44

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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.