Home / 21,122.76-31,656.15-11,240.76

Finding the Fourth Proportional to 21,122.76, 31,656.15 and 11,240.76

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Solution

The fourth proportional to 21,122.76, 31,656.15 and 11,240.76 is: 16,846.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.76 : 31,656.15 = 11,240.76 : x
  2. Step 2: Convert to fraction form
    21,122.76/31,656.15 = 11,240.76/x
  3. Step 3: Cross multiply
    21,122.76x = 31,656.15 × 11,240.76
  4. Step 4: Simplify right side
    21,122.76x = 355,839,184.67
  5. Step 5: Solve for x
    x = 355,839,184.67/21,122.76
  6. Step 6: Final answer
    x = 16,846.24

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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.