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Finding the Fourth Proportional to 8,364.40, 11,542.80 and 4,638.40

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Solution

The fourth proportional to 8,364.40, 11,542.80 and 4,638.40 is: 6,400.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,364.40 : 11,542.80 = 4,638.40 : x
  2. Step 2: Convert to fraction form
    8,364.40/11,542.80 = 4,638.40/x
  3. Step 3: Cross multiply
    8,364.40x = 11,542.80 × 4,638.40
  4. Step 4: Simplify right side
    8,364.40x = 53,540,123.52
  5. Step 5: Solve for x
    x = 53,540,123.52/8,364.40
  6. Step 6: Final answer
    x = 6,400.95

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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.