Home / 13,156.21-18,158.88-8,448.69

Finding the Fourth Proportional to 13,156.21, 18,158.88 and 8,448.69

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Solution

The fourth proportional to 13,156.21, 18,158.88 and 8,448.69 is: 11,661.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.21 : 18,158.88 = 8,448.69 : x
  2. Step 2: Convert to fraction form
    13,156.21/18,158.88 = 8,448.69/x
  3. Step 3: Cross multiply
    13,156.21x = 18,158.88 × 8,448.69
  4. Step 4: Simplify right side
    13,156.21x = 153,418,747.87
  5. Step 5: Solve for x
    x = 153,418,747.87/13,156.21
  6. Step 6: Final answer
    x = 11,661.32

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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.