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Finding the Fourth Proportional to 8,989.92, 13,484.96 and 3,146.52

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Solution

The fourth proportional to 8,989.92, 13,484.96 and 3,146.52 is: 4,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.92 : 13,484.96 = 3,146.52 : x
  2. Step 2: Convert to fraction form
    8,989.92/13,484.96 = 3,146.52/x
  3. Step 3: Cross multiply
    8,989.92x = 13,484.96 × 3,146.52
  4. Step 4: Simplify right side
    8,989.92x = 42,430,696.34
  5. Step 5: Solve for x
    x = 42,430,696.34/8,989.92
  6. Step 6: Final answer
    x = 4,719.81

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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.