Home / 20,892.16-28,832.40-12,396.88

Finding the Fourth Proportional to 20,892.16, 28,832.40 and 12,396.88

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Solution

The fourth proportional to 20,892.16, 28,832.40 and 12,396.88 is: 17,108.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.16 : 28,832.40 = 12,396.88 : x
  2. Step 2: Convert to fraction form
    20,892.16/28,832.40 = 12,396.88/x
  3. Step 3: Cross multiply
    20,892.16x = 28,832.40 × 12,396.88
  4. Step 4: Simplify right side
    20,892.16x = 357,431,802.91
  5. Step 5: Solve for x
    x = 357,431,802.91/20,892.16
  6. Step 6: Final answer
    x = 17,108.42

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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.