Home / 21,289.22-29,330.16-16,811.32

Finding the Fourth Proportional to 21,289.22, 29,330.16 and 16,811.32

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Solution

The fourth proportional to 21,289.22, 29,330.16 and 16,811.32 is: 23,160.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.22 : 29,330.16 = 16,811.32 : x
  2. Step 2: Convert to fraction form
    21,289.22/29,330.16 = 16,811.32/x
  3. Step 3: Cross multiply
    21,289.22x = 29,330.16 × 16,811.32
  4. Step 4: Simplify right side
    21,289.22x = 493,078,705.41
  5. Step 5: Solve for x
    x = 493,078,705.41/21,289.22
  6. Step 6: Final answer
    x = 23,160.96

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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.