Home / 21,270.29-29,340.09-13,305.96

Finding the Fourth Proportional to 21,270.29, 29,340.09 and 13,305.96

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Solution

The fourth proportional to 21,270.29, 29,340.09 and 13,305.96 is: 18,354.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.29 : 29,340.09 = 13,305.96 : x
  2. Step 2: Convert to fraction form
    21,270.29/29,340.09 = 13,305.96/x
  3. Step 3: Cross multiply
    21,270.29x = 29,340.09 × 13,305.96
  4. Step 4: Simplify right side
    21,270.29x = 390,398,063.94
  5. Step 5: Solve for x
    x = 390,398,063.94/21,270.29
  6. Step 6: Final answer
    x = 18,354.15

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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.