Home / 21,821.70-32,728.23-9,971.82

Finding the Fourth Proportional to 21,821.70, 32,728.23 and 9,971.82

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Solution

The fourth proportional to 21,821.70, 32,728.23 and 9,971.82 is: 14,955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.70 : 32,728.23 = 9,971.82 : x
  2. Step 2: Convert to fraction form
    21,821.70/32,728.23 = 9,971.82/x
  3. Step 3: Cross multiply
    21,821.70x = 32,728.23 × 9,971.82
  4. Step 4: Simplify right side
    21,821.70x = 326,360,018.48
  5. Step 5: Solve for x
    x = 326,360,018.48/21,821.70
  6. Step 6: Final answer
    x = 14,955.76

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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.