Home / 21,215.21-31,807.67-9,964.27

Finding the Fourth Proportional to 21,215.21, 31,807.67 and 9,964.27

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Solution

The fourth proportional to 21,215.21, 31,807.67 and 9,964.27 is: 14,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.21 : 31,807.67 = 9,964.27 : x
  2. Step 2: Convert to fraction form
    21,215.21/31,807.67 = 9,964.27/x
  3. Step 3: Cross multiply
    21,215.21x = 31,807.67 × 9,964.27
  4. Step 4: Simplify right side
    21,215.21x = 316,940,003.09
  5. Step 5: Solve for x
    x = 316,940,003.09/21,215.21
  6. Step 6: Final answer
    x = 14,939.28

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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.