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Finding the Fourth Proportional to 15,063.76, 20,783.28 and 8,774.96

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Solution

The fourth proportional to 15,063.76, 20,783.28 and 8,774.96 is: 12,106.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.76 : 20,783.28 = 8,774.96 : x
  2. Step 2: Convert to fraction form
    15,063.76/20,783.28 = 8,774.96/x
  3. Step 3: Cross multiply
    15,063.76x = 20,783.28 × 8,774.96
  4. Step 4: Simplify right side
    15,063.76x = 182,372,450.67
  5. Step 5: Solve for x
    x = 182,372,450.67/15,063.76
  6. Step 6: Final answer
    x = 12,106.70

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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.