Home / 21,078.28-29,090.91-12,125.62

Finding the Fourth Proportional to 21,078.28, 29,090.91 and 12,125.62

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Solution

The fourth proportional to 21,078.28, 29,090.91 and 12,125.62 is: 16,735.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.28 : 29,090.91 = 12,125.62 : x
  2. Step 2: Convert to fraction form
    21,078.28/29,090.91 = 12,125.62/x
  3. Step 3: Cross multiply
    21,078.28x = 29,090.91 × 12,125.62
  4. Step 4: Simplify right side
    21,078.28x = 352,745,320.11
  5. Step 5: Solve for x
    x = 352,745,320.11/21,078.28
  6. Step 6: Final answer
    x = 16,735.01

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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.