Home / 21,340.71-29,453.14-11,909.88

Finding the Fourth Proportional to 21,340.71, 29,453.14 and 11,909.88

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Solution

The fourth proportional to 21,340.71, 29,453.14 and 11,909.88 is: 16,437.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.71 : 29,453.14 = 11,909.88 : x
  2. Step 2: Convert to fraction form
    21,340.71/29,453.14 = 11,909.88/x
  3. Step 3: Cross multiply
    21,340.71x = 29,453.14 × 11,909.88
  4. Step 4: Simplify right side
    21,340.71x = 350,783,215.76
  5. Step 5: Solve for x
    x = 350,783,215.76/21,340.71
  6. Step 6: Final answer
    x = 16,437.28

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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.