Home / 21,154.89-31,728.23-8,008.29

Finding the Fourth Proportional to 21,154.89, 31,728.23 and 8,008.29

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Solution

The fourth proportional to 21,154.89, 31,728.23 and 8,008.29 is: 12,010.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.89 : 31,728.23 = 8,008.29 : x
  2. Step 2: Convert to fraction form
    21,154.89/31,728.23 = 8,008.29/x
  3. Step 3: Cross multiply
    21,154.89x = 31,728.23 × 8,008.29
  4. Step 4: Simplify right side
    21,154.89x = 254,088,857.02
  5. Step 5: Solve for x
    x = 254,088,857.02/21,154.89
  6. Step 6: Final answer
    x = 12,010.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.