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Finding the Fourth Proportional to 21,033.84, 31,550.76 and 7,182.84

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Solution

The fourth proportional to 21,033.84, 31,550.76 and 7,182.84 is: 10,774.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,033.84 : 31,550.76 = 7,182.84 : x
  2. Step 2: Convert to fraction form
    21,033.84/31,550.76 = 7,182.84/x
  3. Step 3: Cross multiply
    21,033.84x = 31,550.76 × 7,182.84
  4. Step 4: Simplify right side
    21,033.84x = 226,624,060.96
  5. Step 5: Solve for x
    x = 226,624,060.96/21,033.84
  6. Step 6: Final answer
    x = 10,774.26

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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.