Home / 21,138.47-29,172.00-11,707.03

Finding the Fourth Proportional to 21,138.47, 29,172.00 and 11,707.03

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Solution

The fourth proportional to 21,138.47, 29,172.00 and 11,707.03 is: 16,156.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.47 : 29,172.00 = 11,707.03 : x
  2. Step 2: Convert to fraction form
    21,138.47/29,172.00 = 11,707.03/x
  3. Step 3: Cross multiply
    21,138.47x = 29,172.00 × 11,707.03
  4. Step 4: Simplify right side
    21,138.47x = 341,517,493.67
  5. Step 5: Solve for x
    x = 341,517,493.67/21,138.47
  6. Step 6: Final answer
    x = 16,156.21

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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.