Home / 21,071.07-29,078.06-11,639.61

Finding the Fourth Proportional to 21,071.07, 29,078.06 and 11,639.61

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Solution

The fourth proportional to 21,071.07, 29,078.06 and 11,639.61 is: 16,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.07 : 29,078.06 = 11,639.61 : x
  2. Step 2: Convert to fraction form
    21,071.07/29,078.06 = 11,639.61/x
  3. Step 3: Cross multiply
    21,071.07x = 29,078.06 × 11,639.61
  4. Step 4: Simplify right side
    21,071.07x = 338,457,219.76
  5. Step 5: Solve for x
    x = 338,457,219.76/21,071.07
  6. Step 6: Final answer
    x = 16,062.65

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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.