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Finding the Fourth Proportional to 8,603.60, 12,889.38 and 7,225.88

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Solution

The fourth proportional to 8,603.60, 12,889.38 and 7,225.88 is: 10,825.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,603.60 : 12,889.38 = 7,225.88 : x
  2. Step 2: Convert to fraction form
    8,603.60/12,889.38 = 7,225.88/x
  3. Step 3: Cross multiply
    8,603.60x = 12,889.38 × 7,225.88
  4. Step 4: Simplify right side
    8,603.60x = 93,137,113.15
  5. Step 5: Solve for x
    x = 93,137,113.15/8,603.60
  6. Step 6: Final answer
    x = 10,825.37

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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.