Home / 18,688.13-25,775.04-11,974.40

Finding the Fourth Proportional to 18,688.13, 25,775.04 and 11,974.40

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Solution

The fourth proportional to 18,688.13, 25,775.04 and 11,974.40 is: 16,515.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.13 : 25,775.04 = 11,974.40 : x
  2. Step 2: Convert to fraction form
    18,688.13/25,775.04 = 11,974.40/x
  3. Step 3: Cross multiply
    18,688.13x = 25,775.04 × 11,974.40
  4. Step 4: Simplify right side
    18,688.13x = 308,640,638.98
  5. Step 5: Solve for x
    x = 308,640,638.98/18,688.13
  6. Step 6: Final answer
    x = 16,515.33

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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.