Home / 21,832.13-30,128.45-12,758.03

Finding the Fourth Proportional to 21,832.13, 30,128.45 and 12,758.03

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Solution

The fourth proportional to 21,832.13, 30,128.45 and 12,758.03 is: 17,606.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,832.13 : 30,128.45 = 12,758.03 : x
  2. Step 2: Convert to fraction form
    21,832.13/30,128.45 = 12,758.03/x
  3. Step 3: Cross multiply
    21,832.13x = 30,128.45 × 12,758.03
  4. Step 4: Simplify right side
    21,832.13x = 384,379,454.52
  5. Step 5: Solve for x
    x = 384,379,454.52/21,832.13
  6. Step 6: Final answer
    x = 17,606.14

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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.