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Finding the Fourth Proportional to 18,946.80, 28,420.20 and 9,730.80

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Solution

The fourth proportional to 18,946.80, 28,420.20 and 9,730.80 is: 14,596.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.80 : 28,420.20 = 9,730.80 : x
  2. Step 2: Convert to fraction form
    18,946.80/28,420.20 = 9,730.80/x
  3. Step 3: Cross multiply
    18,946.80x = 28,420.20 × 9,730.80
  4. Step 4: Simplify right side
    18,946.80x = 276,551,282.16
  5. Step 5: Solve for x
    x = 276,551,282.16/18,946.80
  6. Step 6: Final answer
    x = 14,596.20

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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.