Home / 13,158.09-18,157.86-7,189.92

Finding the Fourth Proportional to 13,158.09, 18,157.86 and 7,189.92

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Solution

The fourth proportional to 13,158.09, 18,157.86 and 7,189.92 is: 9,921.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.09 : 18,157.86 = 7,189.92 : x
  2. Step 2: Convert to fraction form
    13,158.09/18,157.86 = 7,189.92/x
  3. Step 3: Cross multiply
    13,158.09x = 18,157.86 × 7,189.92
  4. Step 4: Simplify right side
    13,158.09x = 130,553,560.77
  5. Step 5: Solve for x
    x = 130,553,560.77/13,158.09
  6. Step 6: Final answer
    x = 9,921.92

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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.