Home / 21,891.44-30,210.92-12,946.61

Finding the Fourth Proportional to 21,891.44, 30,210.92 and 12,946.61

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Solution

The fourth proportional to 21,891.44, 30,210.92 and 12,946.61 is: 17,866.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,891.44 : 30,210.92 = 12,946.61 : x
  2. Step 2: Convert to fraction form
    21,891.44/30,210.92 = 12,946.61/x
  3. Step 3: Cross multiply
    21,891.44x = 30,210.92 × 12,946.61
  4. Step 4: Simplify right side
    21,891.44x = 391,128,856.02
  5. Step 5: Solve for x
    x = 391,128,856.02/21,891.44
  6. Step 6: Final answer
    x = 17,866.75

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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.