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Finding the Fourth Proportional to 19,178.40, 28,797.30 and 10,430.40

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Solution

The fourth proportional to 19,178.40, 28,797.30 and 10,430.40 is: 15,661.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,178.40 : 28,797.30 = 10,430.40 : x
  2. Step 2: Convert to fraction form
    19,178.40/28,797.30 = 10,430.40/x
  3. Step 3: Cross multiply
    19,178.40x = 28,797.30 × 10,430.40
  4. Step 4: Simplify right side
    19,178.40x = 300,367,357.92
  5. Step 5: Solve for x
    x = 300,367,357.92/19,178.40
  6. Step 6: Final answer
    x = 15,661.75

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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.