Home / 20,494.49-28,282.82-12,428.40

Finding the Fourth Proportional to 20,494.49, 28,282.82 and 12,428.40

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Solution

The fourth proportional to 20,494.49, 28,282.82 and 12,428.40 is: 17,151.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,494.49 : 28,282.82 = 12,428.40 : x
  2. Step 2: Convert to fraction form
    20,494.49/28,282.82 = 12,428.40/x
  3. Step 3: Cross multiply
    20,494.49x = 28,282.82 × 12,428.40
  4. Step 4: Simplify right side
    20,494.49x = 351,510,313.92
  5. Step 5: Solve for x
    x = 351,510,313.92/20,494.49
  6. Step 6: Final answer
    x = 17,151.46

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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.