Home / 12,140.54-16,749.68-9,308.78

Finding the Fourth Proportional to 12,140.54, 16,749.68 and 9,308.78

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Solution

The fourth proportional to 12,140.54, 16,749.68 and 9,308.78 is: 12,842.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.54 : 16,749.68 = 9,308.78 : x
  2. Step 2: Convert to fraction form
    12,140.54/16,749.68 = 9,308.78/x
  3. Step 3: Cross multiply
    12,140.54x = 16,749.68 × 9,308.78
  4. Step 4: Simplify right side
    12,140.54x = 155,919,086.19
  5. Step 5: Solve for x
    x = 155,919,086.19/12,140.54
  6. Step 6: Final answer
    x = 12,842.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.