Home / 20,921.55-31,379.59-9,232.03

Finding the Fourth Proportional to 20,921.55, 31,379.59 and 9,232.03

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Solution

The fourth proportional to 20,921.55, 31,379.59 and 9,232.03 is: 13,846.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.55 : 31,379.59 = 9,232.03 : x
  2. Step 2: Convert to fraction form
    20,921.55/31,379.59 = 9,232.03/x
  3. Step 3: Cross multiply
    20,921.55x = 31,379.59 × 9,232.03
  4. Step 4: Simplify right side
    20,921.55x = 289,697,315.10
  5. Step 5: Solve for x
    x = 289,697,315.10/20,921.55
  6. Step 6: Final answer
    x = 13,846.84

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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.