Home / 21,323.40-29,425.50-11,891.76

Finding the Fourth Proportional to 21,323.40, 29,425.50 and 11,891.76

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Solution

The fourth proportional to 21,323.40, 29,425.50 and 11,891.76 is: 16,410.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,323.40 : 29,425.50 = 11,891.76 : x
  2. Step 2: Convert to fraction form
    21,323.40/29,425.50 = 11,891.76/x
  3. Step 3: Cross multiply
    21,323.40x = 29,425.50 × 11,891.76
  4. Step 4: Simplify right side
    21,323.40x = 349,920,983.88
  5. Step 5: Solve for x
    x = 349,920,983.88/21,323.40
  6. Step 6: Final answer
    x = 16,410.19

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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.