Home / 21,611.04-29,823.76-11,920.84

Finding the Fourth Proportional to 21,611.04, 29,823.76 and 11,920.84

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Solution

The fourth proportional to 21,611.04, 29,823.76 and 11,920.84 is: 16,451.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,611.04 : 29,823.76 = 11,920.84 : x
  2. Step 2: Convert to fraction form
    21,611.04/29,823.76 = 11,920.84/x
  3. Step 3: Cross multiply
    21,611.04x = 29,823.76 × 11,920.84
  4. Step 4: Simplify right side
    21,611.04x = 355,524,271.16
  5. Step 5: Solve for x
    x = 355,524,271.16/21,611.04
  6. Step 6: Final answer
    x = 16,451.05

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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.