Home / 21,328.59-31,997.89-7,288.73

Finding the Fourth Proportional to 21,328.59, 31,997.89 and 7,288.73

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Solution

The fourth proportional to 21,328.59, 31,997.89 and 7,288.73 is: 10,934.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.59 : 31,997.89 = 7,288.73 : x
  2. Step 2: Convert to fraction form
    21,328.59/31,997.89 = 7,288.73/x
  3. Step 3: Cross multiply
    21,328.59x = 31,997.89 × 7,288.73
  4. Step 4: Simplify right side
    21,328.59x = 233,224,088.88
  5. Step 5: Solve for x
    x = 233,224,088.88/21,328.59
  6. Step 6: Final answer
    x = 10,934.81

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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.