Home / 13,156.17-18,155.21-7,187.87

Finding the Fourth Proportional to 13,156.17, 18,155.21 and 7,187.87

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Solution

The fourth proportional to 13,156.17, 18,155.21 and 7,187.87 is: 9,919.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.17 : 18,155.21 = 7,187.87 : x
  2. Step 2: Convert to fraction form
    13,156.17/18,155.21 = 7,187.87/x
  3. Step 3: Cross multiply
    13,156.17x = 18,155.21 × 7,187.87
  4. Step 4: Simplify right side
    13,156.17x = 130,497,289.30
  5. Step 5: Solve for x
    x = 130,497,289.30/13,156.17
  6. Step 6: Final answer
    x = 9,919.09

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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.