Home / 21,190.19-31,785.45-9,791.06

Finding the Fourth Proportional to 21,190.19, 31,785.45 and 9,791.06

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Solution

The fourth proportional to 21,190.19, 31,785.45 and 9,791.06 is: 14,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,190.19 : 31,785.45 = 9,791.06 : x
  2. Step 2: Convert to fraction form
    21,190.19/31,785.45 = 9,791.06/x
  3. Step 3: Cross multiply
    21,190.19x = 31,785.45 × 9,791.06
  4. Step 4: Simplify right side
    21,190.19x = 311,213,199.12
  5. Step 5: Solve for x
    x = 311,213,199.12/21,190.19
  6. Step 6: Final answer
    x = 14,686.66

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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.