Home / 21,110.29-31,653.75-8,639.08

Finding the Fourth Proportional to 21,110.29, 31,653.75 and 8,639.08

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Solution

The fourth proportional to 21,110.29, 31,653.75 and 8,639.08 is: 12,953.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.29 : 31,653.75 = 8,639.08 : x
  2. Step 2: Convert to fraction form
    21,110.29/31,653.75 = 8,639.08/x
  3. Step 3: Cross multiply
    21,110.29x = 31,653.75 × 8,639.08
  4. Step 4: Simplify right side
    21,110.29x = 273,459,278.55
  5. Step 5: Solve for x
    x = 273,459,278.55/21,110.29
  6. Step 6: Final answer
    x = 12,953.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.