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Finding the Fourth Proportional to 8,298.40, 12,411.60 and 7,427.20

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Solution

The fourth proportional to 8,298.40, 12,411.60 and 7,427.20 is: 11,108.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,298.40 : 12,411.60 = 7,427.20 : x
  2. Step 2: Convert to fraction form
    8,298.40/12,411.60 = 7,427.20/x
  3. Step 3: Cross multiply
    8,298.40x = 12,411.60 × 7,427.20
  4. Step 4: Simplify right side
    8,298.40x = 92,183,435.52
  5. Step 5: Solve for x
    x = 92,183,435.52/8,298.40
  6. Step 6: Final answer
    x = 11,108.58

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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.