Home / 21,039.12-29,035.10-12,087.20

Finding the Fourth Proportional to 21,039.12, 29,035.10 and 12,087.20

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Solution

The fourth proportional to 21,039.12, 29,035.10 and 12,087.20 is: 16,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039.12 : 29,035.10 = 12,087.20 : x
  2. Step 2: Convert to fraction form
    21,039.12/29,035.10 = 12,087.20/x
  3. Step 3: Cross multiply
    21,039.12x = 29,035.10 × 12,087.20
  4. Step 4: Simplify right side
    21,039.12x = 350,952,855.11
  5. Step 5: Solve for x
    x = 350,952,855.11/21,039.12
  6. Step 6: Final answer
    x = 16,680.97

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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.