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Finding the Fourth Proportional to 8,603.36, 12,887.76 and 7,281.44

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Solution

The fourth proportional to 8,603.36, 12,887.76 and 7,281.44 is: 10,907.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.36 : 12,887.76 = 7,281.44 : x
  2. Step 2: Convert to fraction form
    8,603.36/12,887.76 = 7,281.44/x
  3. Step 3: Cross multiply
    8,603.36x = 12,887.76 × 7,281.44
  4. Step 4: Simplify right side
    8,603.36x = 93,841,451.17
  5. Step 5: Solve for x
    x = 93,841,451.17/8,603.36
  6. Step 6: Final answer
    x = 10,907.54

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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.