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Finding the Fourth Proportional to 8,915.60, 13,360.60 and 6,557.20

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Solution

The fourth proportional to 8,915.60, 13,360.60 and 6,557.20 is: 9,826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.60 : 13,360.60 = 6,557.20 : x
  2. Step 2: Convert to fraction form
    8,915.60/13,360.60 = 6,557.20/x
  3. Step 3: Cross multiply
    8,915.60x = 13,360.60 × 6,557.20
  4. Step 4: Simplify right side
    8,915.60x = 87,608,126.32
  5. Step 5: Solve for x
    x = 87,608,126.32/8,915.60
  6. Step 6: Final answer
    x = 9,826.39

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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.