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Finding the Fourth Proportional to 8,705.52, 12,016.08 and 7,137.36

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Solution

The fourth proportional to 8,705.52, 12,016.08 and 7,137.36 is: 9,851.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.52 : 12,016.08 = 7,137.36 : x
  2. Step 2: Convert to fraction form
    8,705.52/12,016.08 = 7,137.36/x
  3. Step 3: Cross multiply
    8,705.52x = 12,016.08 × 7,137.36
  4. Step 4: Simplify right side
    8,705.52x = 85,763,088.75
  5. Step 5: Solve for x
    x = 85,763,088.75/8,705.52
  6. Step 6: Final answer
    x = 9,851.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.