Home / 21,076.13-29,088.12-12,578.61

Finding the Fourth Proportional to 21,076.13, 29,088.12 and 12,578.61

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Solution

The fourth proportional to 21,076.13, 29,088.12 and 12,578.61 is: 17,360.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.13 : 29,088.12 = 12,578.61 : x
  2. Step 2: Convert to fraction form
    21,076.13/29,088.12 = 12,578.61/x
  3. Step 3: Cross multiply
    21,076.13x = 29,088.12 × 12,578.61
  4. Step 4: Simplify right side
    21,076.13x = 365,888,273.36
  5. Step 5: Solve for x
    x = 365,888,273.36/21,076.13
  6. Step 6: Final answer
    x = 17,360.31

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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.