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Finding the Fourth Proportional to 22,830.60, 34,245.90 and 12,989.10

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Solution

The fourth proportional to 22,830.60, 34,245.90 and 12,989.10 is: 19,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,830.60 : 34,245.90 = 12,989.10 : x
  2. Step 2: Convert to fraction form
    22,830.60/34,245.90 = 12,989.10/x
  3. Step 3: Cross multiply
    22,830.60x = 34,245.90 × 12,989.10
  4. Step 4: Simplify right side
    22,830.60x = 444,823,419.69
  5. Step 5: Solve for x
    x = 444,823,419.69/22,830.60
  6. Step 6: Final answer
    x = 19,483.65

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Double scale
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Similar ratio
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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.