Home / 21,000.40-31,471.02-11,644.72

Finding the Fourth Proportional to 21,000.40, 31,471.02 and 11,644.72

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Solution

The fourth proportional to 21,000.40, 31,471.02 and 11,644.72 is: 17,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.40 : 31,471.02 = 11,644.72 : x
  2. Step 2: Convert to fraction form
    21,000.40/31,471.02 = 11,644.72/x
  3. Step 3: Cross multiply
    21,000.40x = 31,471.02 × 11,644.72
  4. Step 4: Simplify right side
    21,000.40x = 366,471,216.01
  5. Step 5: Solve for x
    x = 366,471,216.01/21,000.40
  6. Step 6: Final answer
    x = 17,450.68

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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.