Home / 20,420.84-28,186.58-11,924.96

Finding the Fourth Proportional to 20,420.84, 28,186.58 and 11,924.96

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Solution

The fourth proportional to 20,420.84, 28,186.58 and 11,924.96 is: 16,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.84 : 28,186.58 = 11,924.96 : x
  2. Step 2: Convert to fraction form
    20,420.84/28,186.58 = 11,924.96/x
  3. Step 3: Cross multiply
    20,420.84x = 28,186.58 × 11,924.96
  4. Step 4: Simplify right side
    20,420.84x = 336,123,727.92
  5. Step 5: Solve for x
    x = 336,123,727.92/20,420.84
  6. Step 6: Final answer
    x = 16,459.84

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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.