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Finding the Fourth Proportional to 8,392.40, 12,592.20 and 4,288.40

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Solution

The fourth proportional to 8,392.40, 12,592.20 and 4,288.40 is: 6,434.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.40 : 12,592.20 = 4,288.40 : x
  2. Step 2: Convert to fraction form
    8,392.40/12,592.20 = 4,288.40/x
  3. Step 3: Cross multiply
    8,392.40x = 12,592.20 × 4,288.40
  4. Step 4: Simplify right side
    8,392.40x = 54,000,390.48
  5. Step 5: Solve for x
    x = 54,000,390.48/8,392.40
  6. Step 6: Final answer
    x = 6,434.44

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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.