Home / 13,158.86-18,159.46-7,190.78

Finding the Fourth Proportional to 13,158.86, 18,159.46 and 7,190.78

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Solution

The fourth proportional to 13,158.86, 18,159.46 and 7,190.78 is: 9,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.86 : 18,159.46 = 7,190.78 : x
  2. Step 2: Convert to fraction form
    13,158.86/18,159.46 = 7,190.78/x
  3. Step 3: Cross multiply
    13,158.86x = 18,159.46 × 7,190.78
  4. Step 4: Simplify right side
    13,158.86x = 130,580,573.00
  5. Step 5: Solve for x
    x = 130,580,573.00/13,158.86
  6. Step 6: Final answer
    x = 9,923.40

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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.