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Finding the Fourth Proportional to 12,021.16, 18,031.74 and 8,945.32

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Solution

The fourth proportional to 12,021.16, 18,031.74 and 8,945.32 is: 13,417.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.16 : 18,031.74 = 8,945.32 : x
  2. Step 2: Convert to fraction form
    12,021.16/18,031.74 = 8,945.32/x
  3. Step 3: Cross multiply
    12,021.16x = 18,031.74 × 8,945.32
  4. Step 4: Simplify right side
    12,021.16x = 161,299,684.46
  5. Step 5: Solve for x
    x = 161,299,684.46/12,021.16
  6. Step 6: Final answer
    x = 13,417.98

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.