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Finding the Fourth Proportional to 18,856.76, 28,265.70 and 8,475.80

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Solution

The fourth proportional to 18,856.76, 28,265.70 and 8,475.80 is: 12,704.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,856.76 : 28,265.70 = 8,475.80 : x
  2. Step 2: Convert to fraction form
    18,856.76/28,265.70 = 8,475.80/x
  3. Step 3: Cross multiply
    18,856.76x = 28,265.70 × 8,475.80
  4. Step 4: Simplify right side
    18,856.76x = 239,574,420.06
  5. Step 5: Solve for x
    x = 239,574,420.06/18,856.76
  6. Step 6: Final answer
    x = 12,704.96

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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.