Home / 42,439.96-63,660.75-12,857.68

Finding the Fourth Proportional to 42,439.96, 63,660.75 and 12,857.68

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Solution

The fourth proportional to 42,439.96, 63,660.75 and 12,857.68 is: 19,286.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,439.96 : 63,660.75 = 12,857.68 : x
  2. Step 2: Convert to fraction form
    42,439.96/63,660.75 = 12,857.68/x
  3. Step 3: Cross multiply
    42,439.96x = 63,660.75 × 12,857.68
  4. Step 4: Simplify right side
    42,439.96x = 818,529,552.06
  5. Step 5: Solve for x
    x = 818,529,552.06/42,439.96
  6. Step 6: Final answer
    x = 19,286.77

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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.