Home / 20,928.51-31,343.56-9,811.26

Finding the Fourth Proportional to 20,928.51, 31,343.56 and 9,811.26

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Solution

The fourth proportional to 20,928.51, 31,343.56 and 9,811.26 is: 14,693.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.51 : 31,343.56 = 9,811.26 : x
  2. Step 2: Convert to fraction form
    20,928.51/31,343.56 = 9,811.26/x
  3. Step 3: Cross multiply
    20,928.51x = 31,343.56 × 9,811.26
  4. Step 4: Simplify right side
    20,928.51x = 307,519,791.96
  5. Step 5: Solve for x
    x = 307,519,791.96/20,928.51
  6. Step 6: Final answer
    x = 14,693.82

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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.