Home / 21,121.48-29,148.96-12,170.17

Finding the Fourth Proportional to 21,121.48, 29,148.96 and 12,170.17

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Solution

The fourth proportional to 21,121.48, 29,148.96 and 12,170.17 is: 16,795.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.48 : 29,148.96 = 12,170.17 : x
  2. Step 2: Convert to fraction form
    21,121.48/29,148.96 = 12,170.17/x
  3. Step 3: Cross multiply
    21,121.48x = 29,148.96 × 12,170.17
  4. Step 4: Simplify right side
    21,121.48x = 354,747,798.52
  5. Step 5: Solve for x
    x = 354,747,798.52/21,121.48
  6. Step 6: Final answer
    x = 16,795.59

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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.