Home / 13,185.57-18,215.85-8,658.99

Finding the Fourth Proportional to 13,185.57, 18,215.85 and 8,658.99

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Solution

The fourth proportional to 13,185.57, 18,215.85 and 8,658.99 is: 11,962.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.57 : 18,215.85 = 8,658.99 : x
  2. Step 2: Convert to fraction form
    13,185.57/18,215.85 = 8,658.99/x
  3. Step 3: Cross multiply
    13,185.57x = 18,215.85 × 8,658.99
  4. Step 4: Simplify right side
    13,185.57x = 157,730,862.99
  5. Step 5: Solve for x
    x = 157,730,862.99/13,185.57
  6. Step 6: Final answer
    x = 11,962.38

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Half scale
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Double scale
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Similar ratio
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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.