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Finding the Fourth Proportional to 30,338.60, 45,491.70 and 12,788.60

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Solution

The fourth proportional to 30,338.60, 45,491.70 and 12,788.60 is: 19,176.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,338.60 : 45,491.70 = 12,788.60 : x
  2. Step 2: Convert to fraction form
    30,338.60/45,491.70 = 12,788.60/x
  3. Step 3: Cross multiply
    30,338.60x = 45,491.70 × 12,788.60
  4. Step 4: Simplify right side
    30,338.60x = 581,775,154.62
  5. Step 5: Solve for x
    x = 581,775,154.62/30,338.60
  6. Step 6: Final answer
    x = 19,176.07

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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.