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Finding the Fourth Proportional to 20,358.95, 30,528.77 and 7,884.81

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Solution

The fourth proportional to 20,358.95, 30,528.77 and 7,884.81 is: 11,823.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.95 : 30,528.77 = 7,884.81 : x
  2. Step 2: Convert to fraction form
    20,358.95/30,528.77 = 7,884.81/x
  3. Step 3: Cross multiply
    20,358.95x = 30,528.77 × 7,884.81
  4. Step 4: Simplify right side
    20,358.95x = 240,713,511.56
  5. Step 5: Solve for x
    x = 240,713,511.56/20,358.95
  6. Step 6: Final answer
    x = 11,823.48

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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.