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Finding the Fourth Proportional to 20,630.52, 30,946.83 and 7,980.24

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Solution

The fourth proportional to 20,630.52, 30,946.83 and 7,980.24 is: 11,970.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.52 : 30,946.83 = 7,980.24 : x
  2. Step 2: Convert to fraction form
    20,630.52/30,946.83 = 7,980.24/x
  3. Step 3: Cross multiply
    20,630.52x = 30,946.83 × 7,980.24
  4. Step 4: Simplify right side
    20,630.52x = 246,963,130.64
  5. Step 5: Solve for x
    x = 246,963,130.64/20,630.52
  6. Step 6: Final answer
    x = 11,970.77

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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.