Home / 21,990.72-32,999.58-18,338.16

Finding the Fourth Proportional to 21,990.72, 32,999.58 and 18,338.16

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Solution

The fourth proportional to 21,990.72, 32,999.58 and 18,338.16 is: 27,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.72 : 32,999.58 = 18,338.16 : x
  2. Step 2: Convert to fraction form
    21,990.72/32,999.58 = 18,338.16/x
  3. Step 3: Cross multiply
    21,990.72x = 32,999.58 × 18,338.16
  4. Step 4: Simplify right side
    21,990.72x = 605,151,577.97
  5. Step 5: Solve for x
    x = 605,151,577.97/21,990.72
  6. Step 6: Final answer
    x = 27,518.50

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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.