Home / 15,828.40-21,843.30-8,755.21

Finding the Fourth Proportional to 15,828.40, 21,843.30 and 8,755.21

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Solution

The fourth proportional to 15,828.40, 21,843.30 and 8,755.21 is: 12,082.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,828.40 : 21,843.30 = 8,755.21 : x
  2. Step 2: Convert to fraction form
    15,828.40/21,843.30 = 8,755.21/x
  3. Step 3: Cross multiply
    15,828.40x = 21,843.30 × 8,755.21
  4. Step 4: Simplify right side
    15,828.40x = 191,242,678.59
  5. Step 5: Solve for x
    x = 191,242,678.59/15,828.40
  6. Step 6: Final answer
    x = 12,082.25

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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.