Home / 14,139.96-21,208.08-8,220.12

Finding the Fourth Proportional to 14,139.96, 21,208.08 and 8,220.12

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Solution

The fourth proportional to 14,139.96, 21,208.08 and 8,220.12 is: 12,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.96 : 21,208.08 = 8,220.12 : x
  2. Step 2: Convert to fraction form
    14,139.96/21,208.08 = 8,220.12/x
  3. Step 3: Cross multiply
    14,139.96x = 21,208.08 × 8,220.12
  4. Step 4: Simplify right side
    14,139.96x = 174,332,962.57
  5. Step 5: Solve for x
    x = 174,332,962.57/14,139.96
  6. Step 6: Final answer
    x = 12,329.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.