Home / 42,435.68-63,653.88-12,855.84

Finding the Fourth Proportional to 42,435.68, 63,653.88 and 12,855.84

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Solution

The fourth proportional to 42,435.68, 63,653.88 and 12,855.84 is: 19,283.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,435.68 : 63,653.88 = 12,855.84 : x
  2. Step 2: Convert to fraction form
    42,435.68/63,653.88 = 12,855.84/x
  3. Step 3: Cross multiply
    42,435.68x = 63,653.88 × 12,855.84
  4. Step 4: Simplify right side
    42,435.68x = 818,324,096.66
  5. Step 5: Solve for x
    x = 818,324,096.66/42,435.68
  6. Step 6: Final answer
    x = 19,283.87

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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.