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Finding the Fourth Proportional to 13,159.15, 18,159.60 and 7,190.86

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Solution

The fourth proportional to 13,159.15, 18,159.60 and 7,190.86 is: 9,923.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.15 : 18,159.60 = 7,190.86 : x
  2. Step 2: Convert to fraction form
    13,159.15/18,159.60 = 7,190.86/x
  3. Step 3: Cross multiply
    13,159.15x = 18,159.60 × 7,190.86
  4. Step 4: Simplify right side
    13,159.15x = 130,583,141.26
  5. Step 5: Solve for x
    x = 130,583,141.26/13,159.15
  6. Step 6: Final answer
    x = 9,923.37

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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.