Home / 21,102.11-29,126.67-13,139.63

Finding the Fourth Proportional to 21,102.11, 29,126.67 and 13,139.63

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Solution

The fourth proportional to 21,102.11, 29,126.67 and 13,139.63 is: 18,136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.11 : 29,126.67 = 13,139.63 : x
  2. Step 2: Convert to fraction form
    21,102.11/29,126.67 = 13,139.63/x
  3. Step 3: Cross multiply
    21,102.11x = 29,126.67 × 13,139.63
  4. Step 4: Simplify right side
    21,102.11x = 382,713,666.93
  5. Step 5: Solve for x
    x = 382,713,666.93/21,102.11
  6. Step 6: Final answer
    x = 18,136.27

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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.