Home / 13,140.20-18,132.96-7,171.86

Finding the Fourth Proportional to 13,140.20, 18,132.96 and 7,171.86

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Solution

The fourth proportional to 13,140.20, 18,132.96 and 7,171.86 is: 9,896.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.20 : 18,132.96 = 7,171.86 : x
  2. Step 2: Convert to fraction form
    13,140.20/18,132.96 = 7,171.86/x
  3. Step 3: Cross multiply
    13,140.20x = 18,132.96 × 7,171.86
  4. Step 4: Simplify right side
    13,140.20x = 130,047,167.71
  5. Step 5: Solve for x
    x = 130,047,167.71/13,140.20
  6. Step 6: Final answer
    x = 9,896.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.