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Finding the Fourth Proportional to 20,483.45, 30,724.98 and 9,386.99

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Solution

The fourth proportional to 20,483.45, 30,724.98 and 9,386.99 is: 14,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.45 : 30,724.98 = 9,386.99 : x
  2. Step 2: Convert to fraction form
    20,483.45/30,724.98 = 9,386.99/x
  3. Step 3: Cross multiply
    20,483.45x = 30,724.98 × 9,386.99
  4. Step 4: Simplify right side
    20,483.45x = 288,415,121.62
  5. Step 5: Solve for x
    x = 288,415,121.62/20,483.45
  6. Step 6: Final answer
    x = 14,080.40

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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.