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Finding the Fourth Proportional to 19,009.40, 28,489.20 and 10,225.40

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Solution

The fourth proportional to 19,009.40, 28,489.20 and 10,225.40 is: 15,324.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.40 : 28,489.20 = 10,225.40 : x
  2. Step 2: Convert to fraction form
    19,009.40/28,489.20 = 10,225.40/x
  3. Step 3: Cross multiply
    19,009.40x = 28,489.20 × 10,225.40
  4. Step 4: Simplify right side
    19,009.40x = 291,313,465.68
  5. Step 5: Solve for x
    x = 291,313,465.68/19,009.40
  6. Step 6: Final answer
    x = 15,324.71

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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.