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Finding the Fourth Proportional to 8,456.64, 12,684.48 and 5,015.76

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Solution

The fourth proportional to 8,456.64, 12,684.48 and 5,015.76 is: 7,523.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,456.64 : 12,684.48 = 5,015.76 : x
  2. Step 2: Convert to fraction form
    8,456.64/12,684.48 = 5,015.76/x
  3. Step 3: Cross multiply
    8,456.64x = 12,684.48 × 5,015.76
  4. Step 4: Simplify right side
    8,456.64x = 63,622,307.40
  5. Step 5: Solve for x
    x = 63,622,307.40/8,456.64
  6. Step 6: Final answer
    x = 7,523.36

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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.