Home / 21,271.83-29,355.80-11,712.72

Finding the Fourth Proportional to 21,271.83, 29,355.80 and 11,712.72

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Solution

The fourth proportional to 21,271.83, 29,355.80 and 11,712.72 is: 16,163.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.83 : 29,355.80 = 11,712.72 : x
  2. Step 2: Convert to fraction form
    21,271.83/29,355.80 = 11,712.72/x
  3. Step 3: Cross multiply
    21,271.83x = 29,355.80 × 11,712.72
  4. Step 4: Simplify right side
    21,271.83x = 343,836,265.78
  5. Step 5: Solve for x
    x = 343,836,265.78/21,271.83
  6. Step 6: Final answer
    x = 16,163.93

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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.