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Finding the Fourth Proportional to 8,651.64, 11,938.80 and 4,875

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Solution

The fourth proportional to 8,651.64, 11,938.80 and 4,875 is: 6,727.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.64 : 11,938.80 = 4,875 : x
  2. Step 2: Convert to fraction form
    8,651.64/11,938.80 = 4,875/x
  3. Step 3: Cross multiply
    8,651.64x = 11,938.80 × 4,875
  4. Step 4: Simplify right side
    8,651.64x = 58,201,650
  5. Step 5: Solve for x
    x = 58,201,650/8,651.64
  6. Step 6: Final answer
    x = 6,727.24

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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.