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Finding the Fourth Proportional to 42,428.56, 63,642.84 and 11,263

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Solution

The fourth proportional to 42,428.56, 63,642.84 and 11,263 is: 16,894.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,428.56 : 63,642.84 = 11,263 : x
  2. Step 2: Convert to fraction form
    42,428.56/63,642.84 = 11,263/x
  3. Step 3: Cross multiply
    42,428.56x = 63,642.84 × 11,263
  4. Step 4: Simplify right side
    42,428.56x = 716,809,306.92
  5. Step 5: Solve for x
    x = 716,809,306.92/42,428.56
  6. Step 6: Final answer
    x = 16,894.50

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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.