Home / 12,630.92-18,946.38-4,421

Finding the Fourth Proportional to 12,630.92, 18,946.38 and 4,421

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Solution

The fourth proportional to 12,630.92, 18,946.38 and 4,421 is: 6,631.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.92 : 18,946.38 = 4,421 : x
  2. Step 2: Convert to fraction form
    12,630.92/18,946.38 = 4,421/x
  3. Step 3: Cross multiply
    12,630.92x = 18,946.38 × 4,421
  4. Step 4: Simplify right side
    12,630.92x = 83,761,945.98
  5. Step 5: Solve for x
    x = 83,761,945.98/12,630.92
  6. Step 6: Final answer
    x = 6,631.50

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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.