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Finding the Fourth Proportional to 11,875.74, 17,819.76 and 8,615.76

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Solution

The fourth proportional to 11,875.74, 17,819.76 and 8,615.76 is: 12,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,875.74 : 17,819.76 = 8,615.76 : x
  2. Step 2: Convert to fraction form
    11,875.74/17,819.76 = 8,615.76/x
  3. Step 3: Cross multiply
    11,875.74x = 17,819.76 × 8,615.76
  4. Step 4: Simplify right side
    11,875.74x = 153,530,775.42
  5. Step 5: Solve for x
    x = 153,530,775.42/11,875.74
  6. Step 6: Final answer
    x = 12,928.10

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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.