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Finding the Fourth Proportional to 8,618.40, 12,927.60 and 8,488.80

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Solution

The fourth proportional to 8,618.40, 12,927.60 and 8,488.80 is: 12,733.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.40 : 12,927.60 = 8,488.80 : x
  2. Step 2: Convert to fraction form
    8,618.40/12,927.60 = 8,488.80/x
  3. Step 3: Cross multiply
    8,618.40x = 12,927.60 × 8,488.80
  4. Step 4: Simplify right side
    8,618.40x = 109,739,810.88
  5. Step 5: Solve for x
    x = 109,739,810.88/8,618.40
  6. Step 6: Final answer
    x = 12,733.20

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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.