Home / 20,288.13-30,431.16-7,140.60

Finding the Fourth Proportional to 20,288.13, 30,431.16 and 7,140.60

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Solution

The fourth proportional to 20,288.13, 30,431.16 and 7,140.60 is: 10,710.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.13 : 30,431.16 = 7,140.60 : x
  2. Step 2: Convert to fraction form
    20,288.13/30,431.16 = 7,140.60/x
  3. Step 3: Cross multiply
    20,288.13x = 30,431.16 × 7,140.60
  4. Step 4: Simplify right side
    20,288.13x = 217,296,741.10
  5. Step 5: Solve for x
    x = 217,296,741.10/20,288.13
  6. Step 6: Final answer
    x = 10,710.54

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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.