Home / 20,288.84-30,397.08-12,387.20

Finding the Fourth Proportional to 20,288.84, 30,397.08 and 12,387.20

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Solution

The fourth proportional to 20,288.84, 30,397.08 and 12,387.20 is: 18,558.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.84 : 30,397.08 = 12,387.20 : x
  2. Step 2: Convert to fraction form
    20,288.84/30,397.08 = 12,387.20/x
  3. Step 3: Cross multiply
    20,288.84x = 30,397.08 × 12,387.20
  4. Step 4: Simplify right side
    20,288.84x = 376,534,709.38
  5. Step 5: Solve for x
    x = 376,534,709.38/20,288.84
  6. Step 6: Final answer
    x = 18,558.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.