Home / 12,255.06-16,909.05-7,218.90

Finding the Fourth Proportional to 12,255.06, 16,909.05 and 7,218.90

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Solution

The fourth proportional to 12,255.06, 16,909.05 and 7,218.90 is: 9,960.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.06 : 16,909.05 = 7,218.90 : x
  2. Step 2: Convert to fraction form
    12,255.06/16,909.05 = 7,218.90/x
  3. Step 3: Cross multiply
    12,255.06x = 16,909.05 × 7,218.90
  4. Step 4: Simplify right side
    12,255.06x = 122,064,741.05
  5. Step 5: Solve for x
    x = 122,064,741.05/12,255.06
  6. Step 6: Final answer
    x = 9,960.35

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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.