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Finding the Fourth Proportional to 8,985.40, 13,478.10 and 6,652.60

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Solution

The fourth proportional to 8,985.40, 13,478.10 and 6,652.60 is: 9,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.40 : 13,478.10 = 6,652.60 : x
  2. Step 2: Convert to fraction form
    8,985.40/13,478.10 = 6,652.60/x
  3. Step 3: Cross multiply
    8,985.40x = 13,478.10 × 6,652.60
  4. Step 4: Simplify right side
    8,985.40x = 89,664,408.06
  5. Step 5: Solve for x
    x = 89,664,408.06/8,985.40
  6. Step 6: Final answer
    x = 9,978.90

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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.