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Finding the Fourth Proportional to 8,415.14, 11,612.88 and 4,689.14

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Solution

The fourth proportional to 8,415.14, 11,612.88 and 4,689.14 is: 6,471.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.14 : 11,612.88 = 4,689.14 : x
  2. Step 2: Convert to fraction form
    8,415.14/11,612.88 = 4,689.14/x
  3. Step 3: Cross multiply
    8,415.14x = 11,612.88 × 4,689.14
  4. Step 4: Simplify right side
    8,415.14x = 54,454,420.12
  5. Step 5: Solve for x
    x = 54,454,420.12/8,415.14
  6. Step 6: Final answer
    x = 6,471.01

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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.