Home / 21,172.66-29,219.54-12,100.86

Finding the Fourth Proportional to 21,172.66, 29,219.54 and 12,100.86

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Solution

The fourth proportional to 21,172.66, 29,219.54 and 12,100.86 is: 16,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.66 : 29,219.54 = 12,100.86 : x
  2. Step 2: Convert to fraction form
    21,172.66/29,219.54 = 12,100.86/x
  3. Step 3: Cross multiply
    21,172.66x = 29,219.54 × 12,100.86
  4. Step 4: Simplify right side
    21,172.66x = 353,581,502.30
  5. Step 5: Solve for x
    x = 353,581,502.30/21,172.66
  6. Step 6: Final answer
    x = 16,699.91

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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.