Home / 13,158.80-18,158.37-7,189.28

Finding the Fourth Proportional to 13,158.80, 18,158.37 and 7,189.28

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Solution

The fourth proportional to 13,158.80, 18,158.37 and 7,189.28 is: 9,920.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.80 : 18,158.37 = 7,189.28 : x
  2. Step 2: Convert to fraction form
    13,158.80/18,158.37 = 7,189.28/x
  3. Step 3: Cross multiply
    13,158.80x = 18,158.37 × 7,189.28
  4. Step 4: Simplify right side
    13,158.80x = 130,545,606.27
  5. Step 5: Solve for x
    x = 130,545,606.27/13,158.80
  6. Step 6: Final answer
    x = 9,920.78

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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.