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Finding the Fourth Proportional to 15,063.90, 20,783.94 and 8,775.06

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Solution

The fourth proportional to 15,063.90, 20,783.94 and 8,775.06 is: 12,107.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.90 : 20,783.94 = 8,775.06 : x
  2. Step 2: Convert to fraction form
    15,063.90/20,783.94 = 8,775.06/x
  3. Step 3: Cross multiply
    15,063.90x = 20,783.94 × 8,775.06
  4. Step 4: Simplify right side
    15,063.90x = 182,380,320.54
  5. Step 5: Solve for x
    x = 182,380,320.54/15,063.90
  6. Step 6: Final answer
    x = 12,107.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.