Home / 11,135.20-16,702.80-7,218.40

Finding the Fourth Proportional to 11,135.20, 16,702.80 and 7,218.40

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Solution

The fourth proportional to 11,135.20, 16,702.80 and 7,218.40 is: 10,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,135.20 : 16,702.80 = 7,218.40 : x
  2. Step 2: Convert to fraction form
    11,135.20/16,702.80 = 7,218.40/x
  3. Step 3: Cross multiply
    11,135.20x = 16,702.80 × 7,218.40
  4. Step 4: Simplify right side
    11,135.20x = 120,567,491.52
  5. Step 5: Solve for x
    x = 120,567,491.52/11,135.20
  6. Step 6: Final answer
    x = 10,827.60

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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.