Home / 13,156.20-18,154.80-7,186.68

Finding the Fourth Proportional to 13,156.20, 18,154.80 and 7,186.68

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Solution

The fourth proportional to 13,156.20, 18,154.80 and 7,186.68 is: 9,917.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.20 : 18,154.80 = 7,186.68 : x
  2. Step 2: Convert to fraction form
    13,156.20/18,154.80 = 7,186.68/x
  3. Step 3: Cross multiply
    13,156.20x = 18,154.80 × 7,186.68
  4. Step 4: Simplify right side
    13,156.20x = 130,472,738.06
  5. Step 5: Solve for x
    x = 130,472,738.06/13,156.20
  6. Step 6: Final answer
    x = 9,917.21

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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.