Home / 12,945.11-19,420.76-7,684.70

Finding the Fourth Proportional to 12,945.11, 19,420.76 and 7,684.70

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Solution

The fourth proportional to 12,945.11, 19,420.76 and 7,684.70 is: 11,528.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.11 : 19,420.76 = 7,684.70 : x
  2. Step 2: Convert to fraction form
    12,945.11/19,420.76 = 7,684.70/x
  3. Step 3: Cross multiply
    12,945.11x = 19,420.76 × 7,684.70
  4. Step 4: Simplify right side
    12,945.11x = 149,242,636.48
  5. Step 5: Solve for x
    x = 149,242,636.48/12,945.11
  6. Step 6: Final answer
    x = 11,528.89

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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.