Home / 21,178.76-29,228.30-11,747.31

Finding the Fourth Proportional to 21,178.76, 29,228.30 and 11,747.31

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Solution

The fourth proportional to 21,178.76, 29,228.30 and 11,747.31 is: 16,212.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.76 : 29,228.30 = 11,747.31 : x
  2. Step 2: Convert to fraction form
    21,178.76/29,228.30 = 11,747.31/x
  3. Step 3: Cross multiply
    21,178.76x = 29,228.30 × 11,747.31
  4. Step 4: Simplify right side
    21,178.76x = 343,353,842.14
  5. Step 5: Solve for x
    x = 343,353,842.14/21,178.76
  6. Step 6: Final answer
    x = 16,212.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.