Home / 20,928.11-31,392.23-5,133.21

Finding the Fourth Proportional to 20,928.11, 31,392.23 and 5,133.21

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Solution

The fourth proportional to 20,928.11, 31,392.23 and 5,133.21 is: 7,699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.11 : 31,392.23 = 5,133.21 : x
  2. Step 2: Convert to fraction form
    20,928.11/31,392.23 = 5,133.21/x
  3. Step 3: Cross multiply
    20,928.11x = 31,392.23 × 5,133.21
  4. Step 4: Simplify right side
    20,928.11x = 161,142,883.29
  5. Step 5: Solve for x
    x = 161,142,883.29/20,928.11
  6. Step 6: Final answer
    x = 7,699.83

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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.