Home / 42,632.84-63,939.60-12,640.88

Finding the Fourth Proportional to 42,632.84, 63,939.60 and 12,640.88

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Solution

The fourth proportional to 42,632.84, 63,939.60 and 12,640.88 is: 18,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,632.84 : 63,939.60 = 12,640.88 : x
  2. Step 2: Convert to fraction form
    42,632.84/63,939.60 = 12,640.88/x
  3. Step 3: Cross multiply
    42,632.84x = 63,939.60 × 12,640.88
  4. Step 4: Simplify right side
    42,632.84x = 808,252,810.85
  5. Step 5: Solve for x
    x = 808,252,810.85/42,632.84
  6. Step 6: Final answer
    x = 18,958.46

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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.