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Finding the Fourth Proportional to 21,999.77, 33,005.79 and 7,219.08

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Solution

The fourth proportional to 21,999.77, 33,005.79 and 7,219.08 is: 10,830.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.77 : 33,005.79 = 7,219.08 : x
  2. Step 2: Convert to fraction form
    21,999.77/33,005.79 = 7,219.08/x
  3. Step 3: Cross multiply
    21,999.77x = 33,005.79 × 7,219.08
  4. Step 4: Simplify right side
    21,999.77x = 238,271,438.47
  5. Step 5: Solve for x
    x = 238,271,438.47/21,999.77
  6. Step 6: Final answer
    x = 10,830.64

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1.5x scale

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.