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Finding the Fourth Proportional to 8,689.05, 11,990.91 and 4,710.15

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Solution

The fourth proportional to 8,689.05, 11,990.91 and 4,710.15 is: 6,500.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.05 : 11,990.91 = 4,710.15 : x
  2. Step 2: Convert to fraction form
    8,689.05/11,990.91 = 4,710.15/x
  3. Step 3: Cross multiply
    8,689.05x = 11,990.91 × 4,710.15
  4. Step 4: Simplify right side
    8,689.05x = 56,478,961.19
  5. Step 5: Solve for x
    x = 56,478,961.19/8,689.05
  6. Step 6: Final answer
    x = 6,500.02

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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.