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Finding the Fourth Proportional to 21,993.30, 30,310.06 and 15,620.17

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Solution

The fourth proportional to 21,993.30, 30,310.06 and 15,620.17 is: 21,526.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.30 : 30,310.06 = 15,620.17 : x
  2. Step 2: Convert to fraction form
    21,993.30/30,310.06 = 15,620.17/x
  3. Step 3: Cross multiply
    21,993.30x = 30,310.06 × 15,620.17
  4. Step 4: Simplify right side
    21,993.30x = 473,448,287.58
  5. Step 5: Solve for x
    x = 473,448,287.58/21,993.30
  6. Step 6: Final answer
    x = 21,526.93

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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.