Home / 8,639.79-11,921.76-4,862.81

Finding the Fourth Proportional to 8,639.79, 11,921.76 and 4,862.81

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Solution

The fourth proportional to 8,639.79, 11,921.76 and 4,862.81 is: 6,710.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.79 : 11,921.76 = 4,862.81 : x
  2. Step 2: Convert to fraction form
    8,639.79/11,921.76 = 4,862.81/x
  3. Step 3: Cross multiply
    8,639.79x = 11,921.76 × 4,862.81
  4. Step 4: Simplify right side
    8,639.79x = 57,973,194.14
  5. Step 5: Solve for x
    x = 57,973,194.14/8,639.79
  6. Step 6: Final answer
    x = 6,710.02

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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.