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Finding the Fourth Proportional to 8,415, 11,612.94 and 4,689.24

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Solution

The fourth proportional to 8,415, 11,612.94 and 4,689.24 is: 6,471.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415 : 11,612.94 = 4,689.24 : x
  2. Step 2: Convert to fraction form
    8,415/11,612.94 = 4,689.24/x
  3. Step 3: Cross multiply
    8,415x = 11,612.94 × 4,689.24
  4. Step 4: Simplify right side
    8,415x = 54,455,862.77
  5. Step 5: Solve for x
    x = 54,455,862.77/8,415
  6. Step 6: Final answer
    x = 6,471.28

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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.